yup got a dyno the otherday a friend sent me of his rx7 since you all know i have always been wondering about the stock twins and a ported motor. and all the bot ons etc.. well hes not a fourm member but i gave him this website so hopefully he will join.. his name is steven and hes from pensacola florida.. i was in the miltary with him..

anyways he calls me up yesterday and said he got his car dyno tuned and it ended up making 368.7 hp at the rear wheels and he has a large street ported motor and hes running the stock sequential twins at 14psi and he has about every bolt on under the sun.. i wish i could get his dyno sheet to post it and give more info but i figured id at least spread the word from what i knew.. I thought those numbers were pretty darn good for the stock twins!

 

that is pretty impressive for the stock twins

do you know what ECU he is running?

 

Thats real good. I had 320rwhp on stock twins at 9-10 psi on the stock intercooler(hot intake temps), DP MP CB, no emissions, intake, PFC, and a large street port done by IRP and tuned by PFS. I wanted to boost it up more but needed a bigger intercooler and ignition. Too bad it blew up drving it home from a meet(PFC went to another setting).

 

That is the second highest number I have ever seen for the stock sequentials. If it was non-sequential that wouldnt be that surprising, however for the sequential setup that is a pretty stout FD.

 

i talked to him and he said the motor is from pettit, and he is running a PFC like most of us.. and has a greddy 3 row front mount and full 3" exhaust and has a hks ignition. and he says his motor is a large streetported one. im tryin to get him to fax me his dyno sheet so i can scan it and post it.
plus that i was hoping if i ran the same id hit 350whp haha!! and i was planning to do it at 15psi not 14!

 

no offence but i doubt such high numbers, in both cases( 9-10psi 320whp and stock intercooler?and 370whp on stock twins)

 

I made 368 to the ground at 15 psi back in 2001 on KDR's dyno. Stock seq twins, ported motor, all the bolts ons, etc. Keep in mind that particular dyno was known for producing pretty optimistic numbers. Who knows, it was many years ago, but from what I remember the car was pretty fast

 

+1

 

yeah i dont know what dyno he used ill ask him when i talk to him tonight. but hes a pretty honest guy and i dont doubt him if he tells me that. when he jokes around he makes it known he is joking but he seemed pretty darn serious when he told me this earlier.

 

nice #s, I'd like to know what AFRs he's running

 

I'd also like to see what the transition looks like.

 

GoodFellaFD3S built the engine and Ray at PFS tuned it. You can contact Ray and ask him for yourself Matt with the Red R1(make sure to add it blew up after 3000 miles). I contacted Rich at IRP after it was tuned. I was running more like 9psi but was spiking 10 (aem tru boost with out stock pills and ported wastegate). It was hot also. IRP did an awesome job on the engine even Ray was shocked with the numbers( i was guessing in the 280 rwhp range). I also ran a 12.6@111mph spinning 2nd and 3rd on street tires.

 

I doubt people are lying about the dyno reports but I'd have to seriously question the dyno calibration.

The stock intercooler has a 3psi or so pressure drop under high rpm boost whereas something like an M2 large has about a 1psi drop under the same conditions- so 320whp on the stock intercooler @9psi would mean that the same car could do ~340 whp with a decent intercooler with less pressure drop. Sorry, but this is beyond unlikely. (And that's ignoring the charge cooling differences between both intercoolers.)

 

Unless Ray was lying about how much boost i was running the sheet he showed me said 320rwhp. He never sent me a copy of the sheet but will call him tomorrow and get a copy to show. And if PFS's dyno is out of calibration then Ernie is not putting down the power he is saying. I thought bigger intercoolers had more pressure drop since there is more area to be filled.

 

thats totally believable. one question though...is the 14psi on the pfc or a boost gauge?

 

its on everyones opinion on what to believe. I dont

and for that let me pass on my experience with the stock twins

greddy 3row smic, downpipe, re-amemiya ecu, intake= 280whp at 0.9bar

my friend's one 317 whp with greddy FMIC, full exhaust power fc and intake at 0.8 bar
Both engines on stock ports and 2002 turbos ..

isnt it true that the US spec rx7s were about 250hp ? How can you jump from 250(roughly 210whp correct?) to another 110whp by just adding 2 things and keeping the same boost levels?

Costas

 

Tell him to drive my way and do some pulls. Then we can compare. Sounds like a nice set-up. Good job. G

 

I can believe those numbers. On two different dynojets, I made 326-327rwhp at 11.3psi (read from Power FC) with street port, seq twins and all bolt-ons.

Jack

 

I'm no expert...but the OP says it's made with 14psi of boost, which is 4 psi above the stock level since stock is at 10 psi, which is actually a big increase.
Just wanted to clarify your misunderstaning on the boost level.
Also, I believe all bolt ons will include more than just 2 things as well.

 

Think he was talking about me. I had more than two things Large Street port, 3in down pipe, 3in mid pipe, and 3in free flow single cat back, fighters garage intake, no emissions, underdrive pullys, light weight flywheel with spec stage 1 clutch, ngk 9's, PFC tuned by Ray, 550 pri 1300 sec cleaned and flow tested at time of rebuild, think that is it all of the other stuff is stock. The ports are very agressive and had overlap which helped alot power wise. It may have different gears i have no clue sine i have not messed with them but i do know the trans was rebuild. All i have to prove right now is a time slip from my 12.6 pass. Also have another slip of me making a 12.7 pass if you do not believe that pass. I had a 2.0 60' on my 12.6 pass which was not that great. And to go from a 13.9 stock to a 12.6 takes more than just bolt ons.

 

you must be genious !!!!!!!! stupid me..i didnt know that 4psi is an increase. Thank you for clarifing my misunderstanding ... Can you give a better explanation for the normal people to understand and stop being so scientific?

anyway..whatever makes you happy guys

 

hmmm i wonder if i can hit that number.

the last dyno pull i did was 345 horses...and the map isnt fully tuned yet. i also have yet to install my HKS twin power, and i still need to rewire the fuel pump. that should be good for a few more, and maybe i can hit 370 with the proper tune...

here are my (power adding) mods:

+ Rebuilt Motor w/ Street Porting
+ 3mm Mazda Apex Seals
+ 8 Piece Block-Off Plate Kit
+ "Rich Man's Non-Seq" Stock Twins w/ ported exhaust manifolds
+ Apexi Power FC & Commander
+ GM 3-Bar Map Sensor
+ Modded Efini "Y" Pipe
+ Custom Stock-Mount Intercooler (18" x 12" x 3.5" core)
+ Blitz Dual SBC Spec-R Dual-Solenoid Boost Controller
+ M2 Carbon Fiber Airbox w/ Dual K&N Filters
+ Jet-Hot Coated 3" Straight-Through Downpipe
+ Rx7store.net Resonated Midpipe
+ HKS Carbon Fiber / Titanium Cat-Back
+ Nippondenso "Supra TT" Fuel Pump
+ KG Parts Secondary Fuel Rail
+ 1600cc Injectors
+ Aeromotive Fuel Pressure Regulator
+ ACT Xtreme Duty Street/Strip Clutch Kit
+ SR Motorsports 9.5lb Aluminum Flywheel
+ Magnacore Spark Plug Cables
+ NGK BUR7EQ & BUR9EQ Plugs
+ Silver GReddy-Style Alternator & Water Pump Pulley Kit

 

You can't compare numbers on the internet, every dyno reads different. Although, they shouldn't.

My experience on a 1 day old Mustang dyno... 328 rwHP @ 17 PSi with BNR twins and a street port.

thewird

 

Reality bites.

I prefer 320whp @9 psi on stock twins.

I also believe in the tooth fairy.

 

One think that many people either don't know, or forget, when comparing dyno numbers...

All dyno's read a little differently. Different brands of dyno's will show a spread of as much as 18%!! I think it's best to state what brand/type of dyno you are using when comparing numbers. For example, Dynojet and Dynopack dyno's tend to read within about 3% of each other. Where as a Dyno-Dynamics dyno will show 15%-18% loss compared to the first two I mentioned.

A dyno is simply a tool.

I think the best way to compare power/performance would be under real world conditions, with a controlled medium. Unfortunately the Nurburg ring isn't just down the road from all of us, so we can't reasonably compare lap times. That being said the best way (if we won't to measure e-penor's) would be to fall back on 1/4 times and E.T.'s..

I'm happy with my dyno readings of 325whp here in England, and I'm fairly positive that I'll measure in the top end of the 300's once I return to the states.