SETA stroker cam options.....???

[JiXer]

What are you guys running in the "budget stroker"; seta bottom end with an i 885 head?
What have you tried?
What works?
What doesn't?
Have you measured valve clearance?
Dyno sheets?
If dyno sheets, what other mods are you running? Head porting? headers? Engine Management?

[SmokeE30]

Schrick 272 works well for a street engine. That with porting and other supporting mods makes a 2.7 scream. I wouldn't go any bigger on a car you like to run around on the street.

[JiXer]

Straight track car. But at 8.5:1 compression would going much hotter than a 272 be worth it? I can get a regrind at any spec for $150. So I just wanna do what works best or that set up regardless of what's available off the shelf.

[SmokeE30]

I could be wrong but I don't think you can really regrind much bigger than 272 anyway and if you could it would be pretty useless without more compression I would look into bumping up the compression a bit if it's a dedicated track car before shelling out more money for a big bump stick

[digger]

a slightly bigger cam upto 280ish would make more power but narrow the powerband a bit due to low CR and would be pretty cammy but on a track car that is wound up over 4000 most of the time it might not be a problem. you need to worry about PtoV though. i would try and rasie the CR as much as possible by skimming head maybe thinner gasket, also set the squish correct and then notch of pistons if needed and get a adjustable cam gear. that will get the best out of a budget stroker with mild cam. it depends how much of a budget stroker you want

[JiXer]

What is PtoV?
Im not going to tear the thing down again to mess with CR. Not worth the time and money. An adjustable cam gear is a thought, but Id likely end up making one myself or slotting the end of the cam to keep the budget down. Do you guys have direct first hand knowledge that the 272/272 works without valve clearance issues? Would love to go a little higher on the intake side, but not much. The cam gear could solve clearance issues in a pinch but Id rather just do what works without it if possible.

[mkcman17]

I'm running a reground ~274* in mine and it seems to not run out of breath up top as much as other head swapped supereta hybrids I've driven/built. Nice, consistent power range from 3300 and up.

Must say $150 is a bit steep though for a stock regrind.

[JiXer]

Did u have to use an adjustable cam gear? And did u change the lift at all? Same lift and duration on both sides? And do u know what the stock i cam specs are?
The regrind is actually $125. I misspoke in the earlier post.
Oh. Last question :) Did u have plenty of adjustment room in the stock eccentrics?
Thanks for the info!!!

[mkcman17]

Did u have to use an adjustable cam gear? And did u change the lift at all? Same lift and duration on both sides? And do u know what the stock i cam specs are?
The regrind is actually $125. I misspoke in the earlier post.
Oh. Last question :) Did u have plenty of adjustment room in the stock eccentrics?
Thanks for the info!!!

Nothing special about the motor besides 17# injectors. Cam needed nothing fancy, stock eccentrics, springs and cam gear. A regrind only increases duration, not lift, so there are limits to how much a stock cam can be altered. Mine cost $75 from a known local machine shop. I think a stock cam is 264*? I could be wrong though.

[JiXer]

Do you think they could make me one to match your's? PM the info? I'm gonna dyno it before and after so I will have real results.

[mkcman17]

Sure, I can PM you their info, but I know that they don't handle the regrinds in-house; they have an agreement with a place in Montebello.

I built the head outside of the car so I don't have a butt dyno before/after with the 2.7 bottom. Midrange torque is noticable over the 2.5 and the top end feels similar.

[MR 325]

A regrind only increases duration, not lift

That's not true.

[digger]

That's not true.

yes, if the basecircle changes then lift changes. if you need oversized eccentrics then there is a good chance the profile has been changed alot more than had you not needed them. for the most part extra lift is free hp across the board to the point of valvetrain reliability. where as duration usually only helps certain parts of the power band and too much duration is a bad thing.

i personally would not run any cam that doesn't come with full cam card specs. and assuming that because it runs with no clearance problems on one engine doesn't mean it will on another.

the 885 head really needs the stability issue with the short side (flow seperation) sorted to make good hp and it doesnt take much porting to achieve this if you know what you are doing

[mkcman17]

That's not true.

Interesting, I was under that impression.

[F34R]

I ran a 288 schrick in my b27i stroker. Used IE HD rockers, IE adjustable cam gear, Schrick High performance springs with a complete head rebuild. I had the cam as close as I could to running and it was not good for daily use. I can see this cam happy on the track as once it was revving the engine was amazing.

I highly suggest a tune from MS to get the timing perfect. Not needed but worth it IMHO. I would personally stick with a 272 or a 274.