I have a non rev up motor (stock block) dynoed last week on a dynojet, it was pretty cold out that day which prolly accounted the 14psi we saw @ 7100.Made around 380whp on the dyno dynamics.
MODS:3.12P/34 tooth cog/strup headers/stillen td exhaust/hfc's/650cc inj/aam rfs/utec.Tuned by dave @ Function tuned.

 

Great #'s. the A/F seems a little rich. What were the #'s on the Function Tuned Dyno for comparo?

 

I have to find those dyno sheets,i agree ist's pig rich although that day could have been in the mid 30's and maybe the utec dumped a bunch of fuel to compensate for the conditions

 

you must have a freak of nature because most cars with that same setup dyno below 400whp. i dont even think 14psi is even physically possible for the 3.12 pulley. you sure you dont have a 2.87? congrats on the fantastic numbers.

 

he's reving the engine to 7100 rpms on a non-REVUP engine, that's why the psi would be high

good numbers

 

Stock block plus 14psi plus 7100rpm equals kaboom!!!!!!!!!!!!!

Nice numbers keep reving it that high and it won't last long

 

very good #s man



I rev mine (03) to 7000 and only see 13psi with the 2.87. What would make the 3.12 pulley make more boost the the 2.87? Not trying to go off topic

 

it depends on the exhaust/engine/intake flow and the rpm you rev to
elevation and ambient air temp can change the psi a little too

I kept my redline at 6600 rpms @ 11 psi. If I had Sam@GTM take it up to 7000, IMO I'd be asking for trouble in the long run even though I might reach close to 13 psi

 

His car def makes power running mid 12's on stock tires, excellent for a heavier G

 

I very seldom hit 7100 i just had him tune it like that in the rear event that i may hit the rev limiter, if you look at the graph around 6600-6700 it starts to fall off a tad that's where i normally shift.
But thanks for the encouraging words

 

I also have the 34 cog pulley installed which would account for the additional psi.

 

Great numbers. Congratz and have fun.

 

Thanks bro i am

 

good #'s!!

the 34T/3.12 cog/serp combo, essentially makes the same ratio as the stock 32t/2.87 combo. so dont let him fool you

you'll give us a good idea of longevity with an overspun impeller on an over-rev'd motor.

 

Nice numbers

 

Great to see this !!!!!

The 34 tooth cog gets you the extra psi for sure . Its a better pulley set up than the 32 tooth and the 2.87 . CONGRATS !!!!!!!!!!!
Also great to see guys post both thier load base dyno and dynojet numbers !!!!!





Hey Sentry
Let the guy have his post with out you saying....if you put this pulley on .....and rev to this rpm .......you would make XXXwhp . Just to let him know you still make more whp than he does . Give us all a break will ya ?????

 

I have been revving my stock 3.5 motor with cams to 7000 rpm with the 3.125 pulley for almost a year now and no problems, knock on wood. I am hard on it and take it to the track alot. Its in a maxima though which is a different setup, I am only getting a max of 8.5-9psi from the 3.125. I think the IC robbed me of around 1-1.5 psi. I have a 2.70 pulley I will be trying soon.

I think the boost doesn't hurt anymore than the rpm's do on the rods. RPM and torque is what is hardest on rods, vortech's don't make any torque except at peak VE, and many N/A people rev to 7000rpm, as did I for a year prior to the S/C. What I am trying to say is that if its ok to rev to 7k on stock rods, boost won't change that much, because the rpm is what is hardest on rods. (assuming a good tune with no detonation)

 

OMG you would take it as bragging. I'll remove the whp estimate then since that bothers you so much.

I was mainly trying to caution about reving 500 rpms higher than redline with boost and trying to show that 13-14psi would be completely possible for the people that weren't sure how 14 psi could be made with the SC-trim

 

Jouvert,

All your power is being made before or at 6600, so there's really no reason to go further than that. I also have my non rev G tuned to 7100, but I did it to avoid bouncing off the rev limiter. By the time I react, I usually wind up shifting at 6600 to 6800 rpm. Great numbers.

 

actually he would accellerate harder by reving past 6600 rpms. Even though the hp drops, the idea is during the rpm range of each gear, you want the highest average hp

if he was shifting from 2nd to 3rd at 6600 rpms, he'd start at 4500 rpms which is obviously a lower hp there than at 5000 rpms.
If he instead shifted at 7100 rpms, he'd start his 3rd gear around 5000 rpms

so look at the hp curve on the graph and figure you were reving from 4500-6600 rpms, or 5000-7100 rpms.
That's for 3rd gear anyway. It's slightly different depending on the gear

see the comparison overlay below where both areas under the curve are overlayed on the left and you can see the higher rpm chart has more hp on average