GT2871 USERS. SR motor

[JacksonBrown]

DynoJet is actually industry standard. It's used by all of the OEM companies. Does it read higher than load based dyno's? Yes. But that still doesn't take away from the fact that it's industry standard.

It's actually pretty comical that someone just stated that 300whp+ is impossible on a 2871 w/ stock cams.

[steve shadows]

Originally Posted by JacksonBrown

DynoJet is actually industry standard. It's used by all of the OEM companies. Does it read higher than load based dyno's? Yes. But that still doesn't take away from the fact that it's industry standard.

It's actually pretty comical that someone just stated that 300whp+ is impossible on a 2871 w/ stock cams.

Which OE?'

Most Germans use a brake -eddy dyno from a company in Britian.

not roller dynos...

I havent seen any OE's who use roller dynos for engine specs, most OEMs use Brake Eddy engine dynos and test motors before they are installed or produced into the chassis


on the note of the HP ceiling we are hitting with your Car Shawn...

I think a larger throttle body and greddy intake manifold and another dyno session might not be a bad idea, I will through in a return discount, OF COURSE MY MAN!!! you know I love ya. Let's go for more.

360 whp with a .64 housing would be killer on a DD espeically if we can pull it off on 91 octane.

a couple things to take care of though immediately

1. weld up that pipe it needs to be air tight, who knows what is actually happening once boost is really moving - this happened on my race car one time (tiny little boost leak off the throttle body nipple) we could never really see improvement over a certain level of boost on the damn thing because of it but it wouldnt really be noticed at idle or off boost because it was check valve or so small of a leak

2. check all other couplinks and replace anything even if it's questionable

3. Check your engine compression one more time to make sure the head has not lifted or anything wierd since we did the full rebuild on your motor (should not but why not check? ya know?)

4. Cam timing - PM me with your cam specs again for sure. I think Mike said we were running staggered? Right? (ps for the zilvanuts Mike Kondo is the one who does all engine building for Shadowerks customers p= and yes that's right I do full engine builds too now)

If we are running staggered it might be time to go to a 264 / 272 stagger and try that out or a 264 and 264 both sides step 1 so we can avoid having to pull the head and do stronger valve springs.

if you have a 256 intake then for sure this could be holding us back on our quest for 350 DD wheel HP on 91 octane

PS. for the Aussie I have tuned two cars with .64 housing 2871Rs up to 301 and 298 WHP respectively and they both had 100% stock engines other than FMIC and Power FC...not bad huh?

God bless the knock box and steady state