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Originally Posted by Turbodriven
(Post 8892214)
Hmm appears to be losing boost at the end of the pull. Does appear to be backpressure maybe blowing the gate open. Does your unit have the 96mm turbine wheel and 1.32A/R housing?? Most of the cars I have worked on with that turbo don't have much of a problem. Also have you got a restrictor on the oil inlet on the turbo?? I have worked on 2 FD's running Borg 475's that ran restrictors...killed the turbos less then 100 miles. Borg's like plenty of oil...
Im running 83mm wheel and 1.10 A/R housing and im not using a restrictor on the oil inlet. |
Switch out to the largest valve seat! Run the preload adjuster all the way out then about 4 turns in. Run the boost line direct to port c and see how well the boost holds. Port C should net you 18psi. If all is well hook to C&A and you should be at ~22psi. Ditch the boost controller for awhile.
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Originally Posted by Turbodriven
(Post 8892214)
Hmm appears to be losing boost at the end of the pull. Does appear to be backpressure maybe blowing the gate open. Does your unit have the 96mm turbine wheel and 1.32A/R housing?? Most of the cars I have worked on with that turbo don't have much of a problem. Also have you got a restrictor on the oil inlet on the turbo?? I have worked on 2 FD's running Borg 475's that ran restrictors...killed the turbos less then 100 miles. Borg's like plenty of oil...
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nice #'s gus, what kind of porting are you running again?
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Originally Posted by SPEED_NYC
(Post 8895109)
nice #'s gus, what kind of porting are you running again?
im running a big street! I removed my ic pipes today and they smelled like vodka :suitdance soon im back on track... :) |
hows the condition of the turbo?
Is the housing scored up? How much oil pressure does your motor have? |
Originally Posted by enzo250
(Post 8897620)
hows the condition of the turbo?
Is the housing scored up? How much oil pressure does your motor have? |
Originally Posted by gusfd3s
(Post 8898067)
The housing is allright, the engine sees about 36psi at idle. could a popped silicone hose cause the problem, over-rev? :wallbash:
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I talked to jz at forced inductions and he told me they had a couple of failures because of over reving. He offered me a cheap repair so im not that worried.
Just got better clamps and did some welding on my intercooler piping so tomorrow i'm back at the dyno. |
Is the engine using larger studs or have any extra dowels?
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how did you get an over rev from intercooler pipes popping off?
And a turbo getting damaged from an overrev? Thats crap. Turbo is simply faulty. IT SHOULD BE COVERED UNDER WARRANTY. Dont give them excuses for them to tell you that they wont be fixing it cause you overreved it, any reason not to honour warranty. Ive had intercooler hoses blow off at over 40psi and nothing happens to the turbo. |
Originally Posted by djseven
(Post 8898941)
Is the engine using larger studs or have any extra dowels?
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Originally Posted by rx72c
(Post 8899108)
how did you get an over rev from intercooler pipes popping off?
And a turbo getting damaged from an overrev? Thats crap. Turbo is simply faulty. IT SHOULD BE COVERED UNDER WARRANTY. Dont give them excuses for them to tell you that they wont be fixing it cause you overreved it, any reason not to honour warranty. Ive had intercooler hoses blow off at over 40psi and nothing happens to the turbo. |
your boost drop off in the high rpm is probably due to the 3" exhaust. I have a feeling that once you upgrade to 4" exhaust, you might pick up 30-40hp in the 7000+ rpm area.
I'm building a car with the EXACT same turbo on a 20B, and I'm running a 5" -> 4" -> dual 3" exhaust. I'm hoping to get 500whp at 10 psi or so, and 650whp at 15 psi. |
Originally Posted by chohakai
(Post 8900778)
your boost drop off in the high rpm is probably due to the 3" exhaust. I have a feeling that once you upgrade to 4" exhaust, you might pick up 30-40hp in the 7000+ rpm area.
I'm building a car with the EXACT same turbo on a 20B, and I'm running a 5" -> 4" -> dual 3" exhaust. I'm hoping to get 500whp at 10 psi or so, and 650whp at 15 psi. Doubt the 3inch exhaust is that much of a problem. the bottle neck starts before the exhaust. remove the exhaust all together and see what happens and then youll know for sure. or make a temp dump tube for the exhaust like the race cars use just to see if it helps. |
i believe chohakai is right, 600whp seems to be the limit of a 3inch exhaust.
Did some more pulls today and boost will hold perfectly steady up to 22psi, even if i put the boost controller to 25psi i will have 22psi by redline. We are routing the exhaust out of the dyno room through a big muffler, we did a test removing it and gained 10whp! I remember i did some tests on my t78 turbo, measured downpipe backpressure and att full power i had 4.5psi of backpressure. I wonder why i never used this information :Wconfused So, im bringing the car back home and ill start fabricating asap, then back to the dyno :) I have to say that the turbo is very responsive!!! |
Are all of your injectors in the LIM and no longer using the primary injector ports? I ask this because you are using the pfc.
Very nice work with the UIM, how did you create velocity stack part of the plate? English wheel? |
Originally Posted by skir2222
(Post 8902844)
Are all of your injectors in the LIM and no longer using the primary injector ports? I ask this because you are using the pfc.
Very nice work with the UIM, how did you create velocity stack part of the plate? English wheel? Im using both primary and secondary, 6 injectors. The 2x2 secondaries are using the same injector driver, setting the PFC to 3360cc for each secondary port (2x1680), Why so many? the car is running on E85 :icon_tup: About the velocity stacks you see that they are divided into 4 square pieces welded together (10mm thick plates), they are made in a lathe with a special tool i made to make the right radius. |
Originally Posted by turboR1
(Post 8894962)
100 miles what? how much of a restriction was used ? what size jet? must have been starved of oil. thats nuts
Yes less then 100. The turbo had a .035 restrictor on it. Not a good thing at all. When it was pulled apart the shaft was blue. Clearly starved badly. |
Originally Posted by gusfd3s
(Post 8901586)
i believe chohakai is right, 600whp seems to be the limit of a 3inch exhaust.
Did some more pulls today and boost will hold perfectly steady up to 22psi, even if i put the boost controller to 25psi i will have 22psi by redline. We are routing the exhaust out of the dyno room through a big muffler, we did a test removing it and gained 10whp! I remember i did some tests on my t78 turbo, measured downpipe backpressure and att full power i had 4.5psi of backpressure. I wonder why i never used this information :Wconfused So, im bringing the car back home and ill start fabricating asap, then back to the dyno :) I have to say that the turbo is very responsive!!! |
Originally Posted by Turbodriven
(Post 8904248)
Glad you got the sucker running again. That turbo is tough. Where is full boost coming in?? Also have you measured backpressure before the inlet to the turbo?
about where full boost is coming in on the street i cannot say, drove the car home but there is snow outside so had no chance to try it out, did some small pulls on the highway and the turbo is there pretty much instantly.. on the rototest we start from 4000rpm and boost is basicly there from the beginning... |
Originally Posted by gusfd3s
(Post 8904676)
Yeah you can see a log on the previous page, i had 28psi backpressure at 22psi boost.
about where full boost is coming in on the street i cannot say, drove the car home but there is snow outside so had no chance to try it out, did some small pulls on the highway and the turbo is there pretty much instantly.. on the rototest we start from 4000rpm and boost is basicly there from the beginning... |
Originally Posted by Turbodriven
(Post 8911411)
Very nice. My buddy just picked one up from the same folks....we got it all bolted up on the car this past Friday night. Car runs awesome and he's only at 24psi. His exhaust like yours is 3". I think we are going to build a 4" exhaust if all possible. Are you planning to stay with the 3"?
Im going 4", trying to find some good 4" mufflers... very hard to find here :wallbash: |
632rwhp so far. He is going to buy the race cover today to see what kind of difference that makes before the swap to the 4" exhaust.
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Originally Posted by Turbodriven
(Post 8911902)
632rwhp so far. He is going to buy the race cover today to see what kind of difference that makes before the swap to the 4" exhaust.
is this with racefuel or e85? 1.10 or 1.32 A/R? i guess that the amount of fuel burned using e85 is causing my 3" to choke? |
Originally Posted by gusfd3s
(Post 8912179)
sweet!! please post the numbers with the race cover when you tried it!
is this with racefuel or e85? 1.10 or 1.32 A/R? i guess that the amount of fuel burned using e85 is causing my 3" to choke? |
been waiting for some parts so got a few days off..
Yesterday i received a 4" v-band clamp so i cut of the 3" flange and did some welding. http://www.molnsatra.se/bil/turbo/avgas/1.jpg http://www.molnsatra.se/bil/turbo/avgas/2.jpg http://www.molnsatra.se/bil/turbo/avgas/3.jpg http://www.molnsatra.se/bil/turbo/avgas/4.jpg tomorrow i'll get my muffler and the pipe so by the end of the weekend im hopefully done! :icon_tup: |
Originally Posted by gusfd3s
(Post 8942198)
been waiting for some parts so got a few days off..
Yesterday i received a 4" v-band clamp so i cut of the 3" flange and did some welding. http://www.molnsatra.se/bil/turbo/avgas/1.jpg http://www.molnsatra.se/bil/turbo/avgas/2.jpg http://www.molnsatra.se/bil/turbo/avgas/3.jpg http://www.molnsatra.se/bil/turbo/avgas/4.jpg tomorrow i'll get my muffler and the pipe so by the end of the weekend im hopefully done! :icon_tup: I tig on my own and I happen to really like the defined bead your welds have. Thanks in advance. Chris |
What i normally use is .035 308 wire for stainless and 309 for stainless to steel..
Gas: Argon, i normally set the regulator at 13~15. I also use a gas lens and usually around 35~85 amps...( depending on thickness) |
Originally Posted by ChrisRX8PR
(Post 8942262)
I hope you don't mind me asking what filler rod you are using for welding the stainless(diam and material), what gas (Argon, Argon/Carbondioxide etc) and at what amps you are welding.
I tig on my own and I happen to really like the defined bead your welds have. Thanks in advance. Chris im using a 1,6mm 316L rod and pure argon, 2,4mm red tungsten. amps i don't know since im using the pedal for heat control.. |
Very nice welds.
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Got some more work done today.
welding some mounts. http://www.molnsatra.se/bil/turbo/avgas/5.jpg http://www.molnsatra.se/bil/turbo/avgas/6.jpg http://www.molnsatra.se/bil/turbo/avgas/7.jpg I had a 5" bend lying around from the downpipe build.. http://www.molnsatra.se/bil/turbo/avgas/8.jpg http://www.molnsatra.se/bil/turbo/avgas/9.jpg http://www.molnsatra.se/bil/turbo/avgas/10.jpg http://www.molnsatra.se/bil/turbo/avgas/11.jpg Still waiting for some material so this was all that i could do today. |
that exhaust tip looks awesome
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Originally Posted by chaotic_fc
(Post 8947410)
that exhaust tip looks awesome
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holy stainless ha you must have spend five grand on all that huge tubing!!!!!!!! Looks good thought, i have to hear those twin waste gates they are prolly going to sound crazy:lol:
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got some work done today...
i finally got my 4" pipes! i decided to try with a single muffler first.. http://www.molnsatra.se/bil/turbo/avgas/a1.jpg http://www.molnsatra.se/bil/turbo/avgas/a2.jpg http://www.molnsatra.se/bil/turbo/avgas/a3.jpg im to cheap to buy real bends... http://www.molnsatra.se/bil/turbo/avgas/a4.jpg took a while to tig everything! http://www.molnsatra.se/bil/turbo/avgas/a5.jpg http://www.molnsatra.se/bil/turbo/avgas/a6.jpg then i fired her up and i must say that im relieved that the sound wasn't as bad as i thought it would! |
lookin' really good man.
when are you going to dyno it with the 4" exhaust? |
looking good gus.. I'm almost finished with my 4" exhaust as well...
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Originally Posted by Chaotic_FC
(Post 8961185)
lookin' really good man.
when are you going to dyno it with the 4" exhaust? |
Originally Posted by enzo250
(Post 8961201)
looking good gus.. I'm almost finished with my 4" exhaust as well...
next step is the 6point roll bar install.. then its time for some axles... |
Originally Posted by gusfd3s
(Post 8961243)
we'll see, havning some problem getting e85 since it's e75 everywhere now, don't have much fuel left in the tank!
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Very very sexy. I'm really liking that exhaust, can't wait to see some vids. Great job :icon_tup::icon_tup:!
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car looks like a rex from hell, lol. wicked manifold, turbo and wastegate setup. not sure of the dump tubes, but hey it works. post some vids soon. good work.
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since i had a trillion 90dgr bends on my intercooler piping i felt like improving the setup.
inlet on intercooler was 2.5". http://www.molnsatra.se/bil/ic/1.jpg welding on 3" piping. http://www.molnsatra.se/bil/ic/2.jpg http://www.molnsatra.se/bil/ic/3.jpg cutting on my newly polished parts :wallbash::wallbash: http://www.molnsatra.se/bil/ic/4.jpg the rad is placed as high as possible. http://www.molnsatra.se/bil/ic/5.jpg http://www.molnsatra.se/bil/ic/6.jpg http://www.molnsatra.se/bil/ic/7.jpg http://www.molnsatra.se/bil/ic/8.jpg http://www.molnsatra.se/bil/ic/9.jpg i'm going to try the new pegasus clamps on this setup! |
this is how the ic setup turned out..
minimum amount of bends and pipe length! http://www.molnsatra.se/bil/ic/10.jpg http://www.molnsatra.se/bil/ic/11.jpg |
how is the clearance under the car with the intercooler pipes being that low?
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pretty much same as before since the rad is mounted about 3inch higher.
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very nice gus!
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Very nice work!:icon_tup:
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Originally Posted by ErnieT
(Post 9061806)
Very nice work!:icon_tup:
I would like to thank everyone for all nice comments!! i've learned alot during this build and i'm more than happy to share! i just got some interior left now... then it is time for a new paint job! |
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