[sspstangbanger]

I am building a N/A 4.6L to turn some RPMs and be a nice street/strip car.
Topend is proven heads/cam combo that went mid 10's N/A and made 430 RWHP on a 5.0 stroked 4.6L.
I have a Cobra crank already and a Teksid block.

My question is how much would I gain with a re-sleeved BB stock stroke over a .020" stock stroke? or would a .020" stroker gain much over a .020' stock stroke?
Is the extra cost worth the gain? My goals are bottom 11's-high 10's N/A and add a 150 shot for occasional extra fun


No matter what will be 11:1-11.5:1 compression and high RPM's topped with 5.5" PSR Mach1 intake and Roy's 7/8" spacer with Accufab Oval blade T-body backed by a Pro-motion 3650/Spec 3+ and 4.10 built rear in a 98 Cobra

 

[sspstangbanger]

anyone ???

 

[bolton3valve]

.020 stock stroke is fine for your goals

 

[sspstangbanger]

Well I bought a Kellogg 3.800" Stroker Crank and Manley 5.85" H-beams(too good of a deal to pass up)
Now I am just torn buying a Boss Block and going 3.700" bore or to just bore my Teksid .020"
It would cost more to re-sleeve my Teksid than buying a new Boss Block so re-sleeving is not a option anymore.

Realistically how much HP is a 3.700" BB worth over a .020" bore?

 

[na svt]

Do not spin a 3.8" stoker over 7500rpm.

The duration of your cams will support high RPMs (7500-8000) only if used with a 5" short runner and 302ci or less. In a 302ci combo expect peak to occur at 7500 and with 281ci expect peak to be around 7900.
Adding cubic inches by going with a 3.7" bore block will result in peak power occuring around 6800rpm.

A 3.7" bore is worth 20-25rwhp as is a 3.8" stroke.

 

[sspstangbanger]

Going to buy a Boss Block now.
Wondering if I should have my combustion chambers unshrouded to the big bore(gotta have one chamber repaired anyways) price would be minimal since heads are going to be gone thru completely and repaired.

 

[na svt]

Wondering if I should have my combustion chambers unshrouded to the big bore(gotta have one chamber repaired anyways) price would be minimal since heads are going to be gone thru completely and repaired.

Yes, don't buy pistons until you know the volume of the chamber. Also, do not buy postons without valve reliefs.