SB2 in a super late?

[fastlane99]

Anyone ever run one of these in a super late? Advantages? Disadvantages? I have access to one, but wasn't sure how they would do. Dyno sheet shows 680hp. We run small tracks that slick off....any advice appreciated.

[ga racer]

you must be new to slm racing , guys have ran them for years.

[powerslide]

Also those numbers sound pretty low for an sb2. How many ci is it?

[fastlane99]

358 I believe. What should the power numbers be?

[powerslide]

We had a 410sb2 and it was around 800. I guess we don't race dynos though so if it runs good wouldn't worry too much.

[sj valley dave]

Our 422" SB2.2 is 810 hp...SB2.2's have ben out there for years as one previous poster commented. 680 hp is low for a 358"...There was a 358" right at 770 hp that ran around here for a few years...That was on a conservative dyno...You had to twist it though...I think they used a 9,000-9,200 chip...We keep ours to 8,400...

[fastlane99]

I was mistaken....730 hp on dyno in the spring.

[andy16]

680 sounds like a chassis dyno number thats close to what mine chassis dynod at. i have a 358 and its my best motor. the thing is they are low maint. and will run forever i reccomend it to somebody who cant afford a 30000 engine w 6000 freshen costs. just remember to turn it. it doesn like 6500 to 7500 the power comes in too fast at the top end of that and is hard to drive. keep it turnin like 78 to 88 and itll be great at least mine is. good luck and mine is for sale or trade for fresh 604

[powerslide]

I was mistaken....730 hp on dyno in the spring.

They have different part numbers some were for the restrictor plate races and some were for for road courses or short tracks. Obviously the DLM crowd would be looking for the road course and short track versions but I cant help you with the part numbers. Maybe someone else could, perfconn may know. If you have access to it i would for sure give it a try.

[hucktyson]

680 sounds like a chassis dyno number thats close to what mine chassis dynod at. i have a 358 and its my best motor. the thing is they are low maint. and will run forever i reccomend it to somebody who cant afford a 30000 engine w 6000 freshen costs. just remember to turn it. it doesn like 6500 to 7500 the power comes in too fast at the top end of that and is hard to drive. keep it turnin like 78 to 88 and itll be great at least mine is. good luck and mine is for sale or trade for fresh 604

how do you say a motor being turning 8800 is low maintainance ??? why wouldnt a 13 degree motor with nice straight pushrods instead of crazy angles that can be turned 8 k and run great not be less maintainance ???

[sj valley dave]

I think he means if you build with correct geometry, they are no more maintenance than any other big HP engine. I run our valves after every race and they never change, unless due to the ambiant air temp..LOL That's with .180 off lifters on intake side only...3/8" CV Products pushrods...T&D shafts..If you put a set of 13* heads on a 360" engine, you'd better be prepared to turn it more than 8,000 if you want to make power, btw...IMO

[andy16]

sorry i meant low maint for the money. meaning short stroke w steel block x nascar piece evrything is built to get its a$$ kicked all day long the valvetrain is great and well thought out no big offsets if using a sb2 block room for great big pushrods the blocks aren moving around as much as alluminum blocks. i set the lash in begining of year and check it evry week but never have to move them. i rev it w confidence i would be worried about a 430 cid aluminum block turning 88 for 20 races straight. i dont have to worry about it over reving because it cant iv turnrd it 92 before for 30 laps springs are fine lash is fine. find me a 13 degree motor for less than ten grand w billet rods crank pistons and 1/2 pushrods .930 lifters 55mm cam polished block w billet caps. i meant there are alot of em out there for cheap that will give you decades of performance at 8800rpms that in my area i wouldn be able to afford. im 100% positive if i gave clements 40,000 i would have any piece just as reliable. i even prefer the 13 or 9 degree motors but for me too expensive for one that will compare to the value of some sb2's out there.

[racin6mod]

I know a guy that has 5 sb2's for sale ranging from a arca engine complete a few from rcr complete w/ drysump pumps and msd dist. 10,000 and 12,000 for the rcr motor one is a earnhart engine from the old shop.

[rickybobby23]

So if the motor has 730 at the crank, about what would there be at the rear wheels? What I'm asking is what's the normal power loss through drivetrain on a late model?

[sj valley dave]

If I remember correct, I think Bill Hendren posted a couple of years ago that with a Brinn and a QC he saw 19% through the drive train. I think he said 17% with a 9" Ford...If Steve ever gets on here anymore, he might verify...