Sleepers project thread By SniperPerformance

[Sleeper]

Did Phil set it to shift at 6K??? He has my bolt on car shifting at 6200-6300.

As much as I would have loved it, Phil didn't do the latest tune

i LOVE how all the other people started recording when that new "pimpalicous" mustang shows up, and then the 2nd gen camaro destroys him!!!!!!!!!!!!!!!!!!!!

Haha! That mustang was badass though. Mid - High 10's all night.

[Gregs_gsxr]

Latest incarnation:

!EGR !AIR.... and maybe an intake.

yup not plastic lol

[DETROITMUSCLE]

Bump the shift points I agree 100% should be more like 6400-6600.

[kammi10]

Bump the shift points I agree 100% should be more like 6400-6600.

agreed bump it up to 6400 and try it..

[kammi10]

here you go bud read alittle.

http://forums.corvetteforum.com/perf...-manifold.html


this dyno sheet below is ms4 with mild port 243 heads

this is after a prc cnc ported with larger valves ls6 head along with more compression by thinner head gasket.

same stuff as above but with a fast intake


the ms4 dose have a advertised power band from 2300-6800rpms with supporting mods,(proper heads/intake/throttle body/tuning)

allan is fighting a couple problems and there not even problems, 1. you can put on a bigger flowing intake and keep a stock throttle body it will still choke it air intake, there will be a slight gain but not as much as if it had even a port TB. 2. his gears are all wrong for the combo, and he will get to that in due time.

with his setup he has time to grow with motor as he puts saves and puts the supporting mods on to reach his goal...

take a look at those sheets.. peak HP continues to grow up to 6600 not at 6k

[Fox Slaughter]

Youre all wrong, set the shift points to 2k and then Vtec will kick in yo!

[Sleeper]

I'll talk with the tuner about bumping up those shift points. It's nice that he goes to all the local T&T's to help any customers with their tunes if they want, so we'll be able to see some real world results if there are any.

We could easily try bumping up the shift point by 100 RPM for each run til it starts to slow down. The weak point on the motor is the pushrods / lifters at this point in regards to RPM, but I'll be doing LS7 stuff when the heads go in soon so it should be safe to spin to 7k, but I doubt we'll need to go even close to that high.

I'm happy with where it's at now though. I'll be taking care of a few maintenance things soon to try and get into the 11's with the current setup and tune.

[Nocooler]

Didn't you put new pushrods in with the cam swap? The lifters should be fine.

100rpm intervals might be a bit much - start at 6200 then go 6400, then maybe a 100 at a time.

Read this http://www.mifbody.com/vbulletin/sho...l=1#post737208 and you'll see how much I gained from upping the shift points. I doubt you'll see that much in an auto car - but you should find 2-3 mph easy

[Sleeper]

Nah, stock pushrods. We knew with these heads it wouldn't spin high anyway.

[Nocooler]

Nah, stock pushrods. We knew with these heads it wouldn't spin high anyway.

That's a big no no - the stock pushrods are junk. Could be part of the reason the power falls off, they might be flexing with the aggressive cam/springs.

Put some pushrods in it ASAP - they are only $100

[Fox Slaughter]

That's a big no no - the stock pushrods are junk. Could be part of the reason the power falls off, they might be flexing with the aggressive cam/springs.

Put some pushrods in it ASAP - they are only $100

Yupp you can put in some Chromoly TFS push rods for 100.

[masterfab]

he did what he could with parts at the time. he knew he needed pushrods and lifters but like many people was trying to get his toy going. with that intake i would say 6400 rpm would be fine i was under the inpression it was a plastic ls6 intake.

allan you keep up the good work. your doing just fine. iv seen alot of people on this forum alone that shaved a few corners in the name of trying to get there car done to a certian point and upgrade later. just like all forums there 1000 so called engine tech that have there point of view. you'v been running the hell out of this thing and its just keeps coming back for more. but trust me one day it will break.

[c0ncEpT]

You sure do blame a lot on the heads. They've been 10.86 in a stock internal car before. There is a shit ton of MPH and ET left in that car without even touching the heads.

[masterfab]

You sure do blame a lot on the heads. They've been 10.86 in a stock internal car before. There is a shit ton of MPH and ET left in that car without even touching the heads.

your right! with porting and so on. this car has nothing more than a shelf cam and intake and headers. he will get there... you gotta start somewhere

[Sleeper]

You sure do blame a lot on the heads. They've been 10.86 in a stock internal car before. There is a shit ton of MPH and ET left in that car without even touching the heads.

With boost? lol...