Unreal

Doesn't matter and doesn't matter.

4.8L-7.2: and 10-40psi. Neither of those numbers limit a blowers max output unless the motor is just way too small to turn the blower.

JasonCzerak

Are you saying that the power will be dictated by blower output? 4.8 liter will make same power as a 7.2 all things the same with exception of displacement?

timmyZ06

4.5 whipple will be much more ,lazy down low. I had the tvs 2300 on the Zr1 (obviously) loved the torque, hated the continual heat soak fight. All in all A&A kit or ECS are VERY hard to beat. When its coming to best bang for the buck vs effiency.

Unreal

Basically. Max power is going to be blower limited, not displacement limited. So yes a 1500 will make 900rwhp on a 4.8 or 8L. Just like my friends Ysi spun with same pullies made 1098 on a 6.2L while mine made 1090 a day later on a 7.0L.

You can move around the map, and be a bit more efficient/etc but max power a blower can make doesn't change much.

JasonCzerak

Very very interesting.

So, here's my "WTF". When I had my wrist pin issue, my motor was rebuilt. ~10 more cubes, 0.35 more compression, same heads just rebuilt/valve job decked (but thicker headgasket). The motor made 30whp more. Would just a refresh in parts normally make up 30whp in these LS motors?

Unreal

Day to day, dyno to dyno, tune, etc.

1-2 degrees of timing would do that.

Difference in power output when not maxing stuff out can vary, but when talking about max power potential of a blower that goes away.

JasonCzerak

Same dyno. Exact tune changes between the 2 I do not know to be honest. I do know that the injectors became maxed out after the rebuild (ordering up ID1000's soon).

How do the graphs look between you and your friends? Mostly identical? Happen to have them available online for viewing?

Unreal

No, graphs are way different. Mine makes 200ft/lbs more at low rpm.

I've seen 40-50rwhp dyno swings on same dyno, just 2 days apart with no changes. People need to stop getting caught up on exact numbers.

BigBird440

It seems Iv started a bit of controversy
My blower makes 725 640 at 8 psi. not even spinning the blower yet its 30lb stable (so say the whipple chart) i plan to try 12/15/18 psi once my short arrives and will put to rest all the bickering,
so far just 2 psi of boost showed large gains i cant wait to double it and see what happens
and finally hear some WHINEEEEEE........

MissYouJJ

I would agree the A&A kit is hard to beat when it comes to price but they don't make power like this Whipple.

MissYouJJ

The ysi made 1090hp on a dynojet ? Please post the graph

bdickey058

For some reason it wont let me play the youtube video. What did it put down?

C6 Curtis

Did you swap over to the billet wheel yet?


-Curtis

schpenxel

YSI is rated to 1200hp if I remember correctly?

Unreal

No interest in billet wheel. 1090 was long long time ago way less power. Now it just maxes it out at 1200.

Ratings are just ratings. Real world is different. Most blowers can make what they are rated at the wheels what they are rated for at the crank. Just like a D1 or Ti trim has done 900rwhp+ even thought they are rated for ~850 crank.

Anyways, back to whipple.

MissYouJJ

If big bird maxes out this blower it should be scratching the 1K area. I am excited to see the final results. My question is did the ysi actually make close to 1100 on a dynojet

realcanuk

Lots of YSI's make 1000+. Why the doubt ?

schpenxel

Yeah not understanding the doubt either..

realcanuk

That Unreal guy is not very trustworthy. Must be that.

MissYouJJ

it just seems so Unreal