twins or single?
#26
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Originally posted by AznPhoenix
what up twins u using? are they better than the 99+ turbos?
what up twins u using? are they better than the 99+ turbos?
joel
#27
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ok... im getting really confused on what way i should go.... i think twins r for me because i need low end power as well as high end. no civic will beat me to 30!!! :-D but... stock or upgarde twins..... 99 spec r too expensive i think... wats the max boost i can run on stock twins with open intake, open exhaust, ecu, ic and such?
#29
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The twin kit from the rx7store and thats about it....you need to have your car so maxed out to make 400 horses with any type of stock/upgraded twins. You can really run about 1 bar on stock twins...thats good for mid 300s. 370 at the absolute best.
#30
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Dont get me wrong...I'm not a twin hater. You just really are not going to make any where near 400 hp with any type of reliability on twin turbos. I'm sure if you get all the basic bolt ons and run 1 bar with your stock twins you will be happy. You will be in the mid 300s and the car will be a quick spooling beast. Just as an example it will be around the same speed as a late 90's viper up to about 110-120. Thats from experience.
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well the one si am gettign are said to flow 50%more air then stockers. i will find out the guys i talk to say they can mke over 400 but some dont. have to find out this spring.
joel
joel
Last edited by bigmack000; 02-25-04 at 01:33 AM.
#32
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I think 50% more is pretty much a flat out lie. The old pettite upgrades did something like 15% more and BnRs do about 20%. I think you'd need a completely different compressor housing to do 50% more...and actually even the ones that have a diff comp housing (ex m2) don't flow 50% more. Make over 400 then show me please.
#33
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Originally posted by widebody2
The single setup 100% is more reliable than a modded out twin turbo car. A twin turbo car putting out 400 hp is running 17-19 lbs of boost. They won't last for very long at that power. They will however put out a whole heck of a lot of heat. The single cars you mentioned, Turbojeff, are unreliable due to the owner being an idiot...not the single turbo setup. That would be the exact same case with a highly modded twin turbo car.
The single setup 100% is more reliable than a modded out twin turbo car. A twin turbo car putting out 400 hp is running 17-19 lbs of boost. They won't last for very long at that power. They will however put out a whole heck of a lot of heat. The single cars you mentioned, Turbojeff, are unreliable due to the owner being an idiot...not the single turbo setup. That would be the exact same case with a highly modded twin turbo car.
The original poster mentions 12psi, the stockers are fine with that power level. The test pool of stock twins lasting years is MUCH larger than the test pool of single turbo cars.
#34
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Originally posted by widebody2
are you talking about the stage 3's goodfella is selling? search under his name.
I have one question though...why does everyone sell their upgraded twins? Search in the parts for sale section for upgraded twins...there are a million sold on there. The reason is they really aren't that much of an upgrade. Whats the best anyone has made on stock twins...I've seen 402. Whats the best on upgraded twins...I've seen 412. Is that worth over $2k? Not in my book. Whats the best anyone has made on a single??? A little higher than 412...right...
are you talking about the stage 3's goodfella is selling? search under his name.
I have one question though...why does everyone sell their upgraded twins? Search in the parts for sale section for upgraded twins...there are a million sold on there. The reason is they really aren't that much of an upgrade. Whats the best anyone has made on stock twins...I've seen 402. Whats the best on upgraded twins...I've seen 412. Is that worth over $2k? Not in my book. Whats the best anyone has made on a single??? A little higher than 412...right...
personally i would not run the stockers at that boost level...heat heat heat.
the 412 on upgraded twins was on PUMPGAS but his timeslips are four mph faster than the car with 402...so spo was probably putting down closer to 430 when he ran the car at the track that day.
#35
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Originally posted by widebody2
Dont get me wrong...I'm not a twin hater. You just really are not going to make any where near 400 hp with any type of reliability on twin turbos. I'm sure if you get all the basic bolt ons and run 1 bar with your stock twins you will be happy. You will be in the mid 300s and the car will be a quick spooling beast. Just as an example it will be around the same speed as a late 90's viper up to about 110-120. Thats from experience.
Dont get me wrong...I'm not a twin hater. You just really are not going to make any where near 400 hp with any type of reliability on twin turbos. I'm sure if you get all the basic bolt ons and run 1 bar with your stock twins you will be happy. You will be in the mid 300s and the car will be a quick spooling beast. Just as an example it will be around the same speed as a late 90's viper up to about 110-120. Thats from experience.
i put down 381 and after 4k miles my twins are still cherry. no leaks..no cracks to my knowledge...and no smoke.
#36
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Originally posted by widebody2
I think 50% more is pretty much a flat out lie. The old pettite upgrades did something like 15% more and BnRs do about 20%. I think you'd need a completely different compressor housing to do 50% more...and actually even the ones that have a diff comp housing (ex m2) don't flow 50% more. Make over 400 then show me please.
I think 50% more is pretty much a flat out lie. The old pettite upgrades did something like 15% more and BnRs do about 20%. I think you'd need a completely different compressor housing to do 50% more...and actually even the ones that have a diff comp housing (ex m2) don't flow 50% more. Make over 400 then show me please.
wrong again. the m2 set uses the stock housings. the internals are all garret gt30 ballistics.
though unless they are running a different manifold they wont be flowing 50 percent more.
j
#37
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Originally posted by AznPhoenix
ok... im getting really confused on what way i should go.... i think twins r for me because i need low end power as well as high end. no civic will beat me to 30!!! :-D but... stock or upgarde twins..... 99 spec r too expensive i think... wats the max boost i can run on stock twins with open intake, open exhaust, ecu, ic and such?
ok... im getting really confused on what way i should go.... i think twins r for me because i need low end power as well as high end. no civic will beat me to 30!!! :-D but... stock or upgarde twins..... 99 spec r too expensive i think... wats the max boost i can run on stock twins with open intake, open exhaust, ecu, ic and such?
wait til march 7th when the new bnr sets are being dynoed by steve kan from gotham.
j
#38
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artguy are you kidding me? you did 381 for 4k miles. I really don't think thats a long enough time to call the reliability record people. plus that is 19 horses away from 400. Oh and at what boost did you do that at? I'm willing to bet my car it wasn't at 1 bar. I'm guessing 17-18 lbs, am I wrong?...I was speaking from experience...I've owned stock twins at 1 bar...BnRs I ran at 17lbs and now a single.
#39
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>>the 402 was on race gas only for the stock twins<<
Artguy: Not sure where your info is coming from but let me correct you........
That 402 rwh was on 100% pump gas (Exxon-93) on STOCK PORTS !!!!!!! hitting 18psi.......wanna know what the previous runs were?????
dyno#42= 397.5rwh_363.5rwt
dyno#41= 398.5rwh_357.7rwt
dyno#40= 395.4rwh_351.2rwt
dyno#39= 394.5rwh_346.9rwt
dyno#38= 392.8rwh_346.9rwt
dyno#38= 389.9rwh_347.6rwt
dyno#37= 390.0rwh_348.2rwt
ENOUGH? have all dyno sheets to prove the numbers!!!!!!!!!!!
As you could see my goal was the 400rwh.......as soon it hit 400 car was off the dyno.
<personally i would not run the stockers at that boost level...heat heat heat.>
I agree!!!!....including any upgraded twin set running OEM exhaust housings!!!!!!!!!!!!!!!
<the 412 on upgraded twins was on PUMPGAS but his timeslips are four mph faster than the car with 402...so spo was probably putting down closer to 430 when he ran the car at the track that day.>
HAHAHAHA........ NOT!!!!! I ran 122.8 mph on stock twins on stock ports and pump gas ........
125-122.8= 2.2 mph !!!!!
By the way I ran 125 NOT once *but* 4-5 times.....with a best 125.4 mph......So I'm making ~430rwh, right?
Artguy: Not sure where your info is coming from but let me correct you........
That 402 rwh was on 100% pump gas (Exxon-93) on STOCK PORTS !!!!!!! hitting 18psi.......wanna know what the previous runs were?????
dyno#42= 397.5rwh_363.5rwt
dyno#41= 398.5rwh_357.7rwt
dyno#40= 395.4rwh_351.2rwt
dyno#39= 394.5rwh_346.9rwt
dyno#38= 392.8rwh_346.9rwt
dyno#38= 389.9rwh_347.6rwt
dyno#37= 390.0rwh_348.2rwt
ENOUGH? have all dyno sheets to prove the numbers!!!!!!!!!!!
As you could see my goal was the 400rwh.......as soon it hit 400 car was off the dyno.
<personally i would not run the stockers at that boost level...heat heat heat.>
I agree!!!!....including any upgraded twin set running OEM exhaust housings!!!!!!!!!!!!!!!
<the 412 on upgraded twins was on PUMPGAS but his timeslips are four mph faster than the car with 402...so spo was probably putting down closer to 430 when he ran the car at the track that day.>
HAHAHAHA........ NOT!!!!! I ran 122.8 mph on stock twins on stock ports and pump gas ........
125-122.8= 2.2 mph !!!!!
By the way I ran 125 NOT once *but* 4-5 times.....with a best 125.4 mph......So I'm making ~430rwh, right?
#41
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back to the original question.............
Up to ~360rwh you cannot beat the hp/ torque curve generated by non-seq twins.....@ 15-16psi. Look at my torque #'s on previous post.
If you need more then 360-380rwh then a single is what I recommend.....a breeze with ~14psi and much less stress/heat.
Up to ~360rwh you cannot beat the hp/ torque curve generated by non-seq twins.....@ 15-16psi. Look at my torque #'s on previous post.
If you need more then 360-380rwh then a single is what I recommend.....a breeze with ~14psi and much less stress/heat.
#43
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Originally posted by Boostn7
>>the 402 was on race gas only for the stock twins<<
Artguy: Not sure where your info is coming from but let me correct you........
That 402 rwh was on 100% pump gas (Exxon-93) on STOCK PORTS !!!!!!! hitting 18psi.......wanna know what the previous runs were?????
dyno#42= 397.5rwh_363.5rwt
dyno#41= 398.5rwh_357.7rwt
dyno#40= 395.4rwh_351.2rwt
dyno#39= 394.5rwh_346.9rwt
dyno#38= 392.8rwh_346.9rwt
dyno#38= 389.9rwh_347.6rwt
dyno#37= 390.0rwh_348.2rwt
ENOUGH? have all dyno sheets to prove the numbers!!!!!!!!!!!
As you could see my goal was the 400rwh.......as soon it hit 400 car was off the dyno.
<personally i would not run the stockers at that boost level...heat heat heat.>
I agree!!!!....including any upgraded twin set running OEM exhaust housings!!!!!!!!!!!!!!!
<the 412 on upgraded twins was on PUMPGAS but his timeslips are four mph faster than the car with 402...so spo was probably putting down closer to 430 when he ran the car at the track that day.>
HAHAHAHA........ NOT!!!!! I ran 122.8 mph on stock twins on stock ports and pump gas ........
125-122.8= 2.2 mph !!!!!
By the way I ran 125 NOT once *but* 4-5 times.....with a best 125.4 mph......So I'm making ~430rwh, right?
>>the 402 was on race gas only for the stock twins<<
Artguy: Not sure where your info is coming from but let me correct you........
That 402 rwh was on 100% pump gas (Exxon-93) on STOCK PORTS !!!!!!! hitting 18psi.......wanna know what the previous runs were?????
dyno#42= 397.5rwh_363.5rwt
dyno#41= 398.5rwh_357.7rwt
dyno#40= 395.4rwh_351.2rwt
dyno#39= 394.5rwh_346.9rwt
dyno#38= 392.8rwh_346.9rwt
dyno#38= 389.9rwh_347.6rwt
dyno#37= 390.0rwh_348.2rwt
ENOUGH? have all dyno sheets to prove the numbers!!!!!!!!!!!
As you could see my goal was the 400rwh.......as soon it hit 400 car was off the dyno.
<personally i would not run the stockers at that boost level...heat heat heat.>
I agree!!!!....including any upgraded twin set running OEM exhaust housings!!!!!!!!!!!!!!!
<the 412 on upgraded twins was on PUMPGAS but his timeslips are four mph faster than the car with 402...so spo was probably putting down closer to 430 when he ran the car at the track that day.>
HAHAHAHA........ NOT!!!!! I ran 122.8 mph on stock twins on stock ports and pump gas ........
125-122.8= 2.2 mph !!!!!
By the way I ran 125 NOT once *but* 4-5 times.....with a best 125.4 mph......So I'm making ~430rwh, right?
my apologies.
j
#44
Originally posted by Boostn7
back to the original question.............
Up to ~360rwh you cannot beat the hp/ torque curve generated by non-seq twins.....@ 15-16psi. Look at my torque #'s on previous post.
If you need more then 360-380rwh then a single is what I recommend.....a breeze with ~14psi and much less stress/heat.
back to the original question.............
Up to ~360rwh you cannot beat the hp/ torque curve generated by non-seq twins.....@ 15-16psi. Look at my torque #'s on previous post.
If you need more then 360-380rwh then a single is what I recommend.....a breeze with ~14psi and much less stress/heat.
artguy said << wait til march 7th when the new bnr sets are being dynoed by steve kan from gotham >> that, im definetly doing. so we can't talk about THAT yet...
widebody2 said << I think you'd need a completely different compressor housing to do 50% more >>
so im wondering, does anyone make upgraded twins w/ completely different manifold/compressor housings? cuz the way I understand it, that's the main problem twins face in producing higher hp #s (400+)...am I correct?
and if my understanding is correct, do most upgrades use the same manifold/compressor housings simply to keep the twins plug n play? cuz i would have NO prob havin my engine bay gutted if i could get some incredibly high flowing twins capable of 450hp or somethin in that area...
another thing...i understand the twins will need to run at higher boost to generate such hp #s (when compared to a large single), and thus they'll generate lots of heat. but is this when we're talking prolonged consistant boost? cuz for my applications (primarily street use, NOT primarily drag/track use), would such heat still be an issue? cuz they'd be maxing out for what... a minute or so? not consistant long periods...all day long
lastly...even in the case of upgraded twins making something like goodfellas' 376hp, couldn't you get considerable hp gains (to compensate for the twins' hp limit) by getting a fairly aggressive engine port?
Last edited by FDNewbie; 02-26-04 at 10:27 AM.
#45
Originally posted by AznPhoenix
ok... im getting really confused on what way i should go.... i think twins r for me because i need low end power as well as high end. no civic will beat me to 30!!! :-D but... stock or upgarde twins..... 99 spec r too expensive i think... wats the max boost i can run on stock twins with open intake, open exhaust, ecu, ic and such?
ok... im getting really confused on what way i should go.... i think twins r for me because i need low end power as well as high end. no civic will beat me to 30!!! :-D but... stock or upgarde twins..... 99 spec r too expensive i think... wats the max boost i can run on stock twins with open intake, open exhaust, ecu, ic and such?
Last edited by Shinobi-X; 02-26-04 at 11:35 AM.
#47
Originally posted by AznPhoenix
non seq twins? wat? wat r those? how do they work. the stock twins r seq... im confused..
non seq twins? wat? wat r those? how do they work. the stock twins r seq... im confused..
Almost every single car that's twin turbo has a non sequential setup...both turbos come online at the same time (also known as running in parallel). This includes supras, 300zx, s4 (audi), 3000gt vr4, etc.
one of the greatest (IMHO) inventions Mazda came up w/ was sequential turbos, so the first turbo comes online virtually instantly, and provides prespool to the second turbo...which will come online later on at higher rpm. In doing so, there's virtually no time lost in spooling up (which you'll get in parallel twins and single turbos), and also, the power curve is relatively constant throughout...
A lot of people who aren't satisified w/ the ETs and torque they're getting w/ sequential turbos modify the twins to run parallel (there's a simple reversible way, and a permanent way as well).
Hope that helps some.
#49
Originally posted by AznPhoenix
which is better? sorry i have hardly anytime to do a in depth search...
which is better? sorry i have hardly anytime to do a in depth search...
oh and buddy...it's not in depth at all. click on the search button (top right, right underneath the white rx7) then type in something like "twins parallel" and you'll get some real good threads that'll hit the point straight home
not that i want to make you work, but a) i dont know enough to answer your question, and b) i dont think anyone's gonna put forth the effort to answer it for ya if they know you can just search for it...
(where's mahjik w/ the links when ya need him haha)
#50
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If you want really good numbers at the track and top end go with a good sized single. The twins are good for better off the line responce b/c they spool faster then a single does. If you do the right tuning with the twins it is posable to make mid 11's. The only real complant I would have on a single turbo is the lag. Other then that again for top speed or good numbers at the track a single is the way to go.