lynwood78

Muscle Motor Performance in Canoga Park,CA.

MMP 5.0 Stroker Street Mod 950 $3,699.00 Labor(R&R Shortblock Dissassembly) - $1,200 Labor (Additional Labor to pull off heads due to bent valve + Stage 3 porting) $2,000

zkiller

Do you hear any piston slap with that stroker?
Do you have the knock sensors still or no?

lynwood78

Here's the dyno sheet

http://i105.photobucket.com/albums/m...ynosept.07.jpg

lynwood78

ratnacage

Those numbers are too low even though you have an auto,especially at the high end - you should be making alot more torque up high. See my sig. 350 rwhp and myCams are similar to the Comp III's. I'm still at 4.6L with untouched headsalso.

My gut feeling is they don't know how to tune the cams - in my experience, this has been the root cause of every car that doesn't make the expected power after cams were done. My cams didn't start to make worthwhile gains until my shop learned how to play with the "cam phasing" (valve timing), which is adjustable if you dig in the code enough. If all you do is throw the cams in and limit your tuning to just ignition timing and fuel mapping (which is all most shops know how to do), the computer will actually try to tame the cams - not unlike a body trying to reject a transplanted organ! This is where you're missing out on BIGHP. If you want to continue using that shop, have them call SCT (SCT has very good customer support) and they should be able to walk them through on howto play with the cams, otherwise find a shop that already knows how to do it. It may take some trial and error, but the power is there.

I attached my dyno showing before and after the cams. The only thing that changed between the two graphs is the "after" has the cams.

[IMG]local://upfiles/30073/76A993EB35004F07B8F0457FEBE60CA9.jpg[/IMG]

downriverT

I might be wrong(most likely) I am no tuning guru but isn't that one fat(rich) A/F ratio shouldn't you be between 11-11.5 instead of over 13 the whole way. To me it just looks like an extremely safe tune.

probinator

sell me your motor. how much was yours?

BillyBobJoe

Actualy if you look close, that A/F ratio is just under 13 most of the time and a few times drops a little. 11-11.5 would probably be way to lean on a motor like this. Most performance minided engines are tuned for about 12.5-13 depending on mods so that should be a good setting. I'm no guru either but I thought I read this somewhere...while trying to set up my old Edelbrock carb probably.

I agree with the tuning. Have the your tuner talk to SCT, or take it to another shop.

Pwny

I also think the numbers are low. However, I sure its just a tuning issue.

fordfanboy

No offesne to you but I think your shop is lying to you. I do not believe you have the knock sensors active with a 302 stroke...

The clearance is just too tight to have them. Do you know what piston slap sounds like? I have one of the loudest exhausts' around and I could easily hear the slap when I had a 302 stroke. I'm sure you have slap just as I'm sure you don't have the knock sensors.

Canoga Park? You should get a second opinion from Extreme Automotive. Call Sean (he is the owner) - they don't do custom tuning but they do some nice motor work.