Limited Late Model HP question

[LeafMaster41]

What's the average power output and cost of a good all steel, flat top limited late engine going for these days? Like what you'd see on the SELMSS(Southeastern Late Model Sportsman Series) in GA. Just curious as I'm not especially fond of crates or CT525's. Anyone running an LS based non-CT525 limited engine? I know the UMSS(traditional sprints) are allowing the LS 5.3 w/factory coil packs and an MSD controller to be run with them and it's competitive and economical too.

[a25rjr]

550-600 hp, $20-25k

[LeafMaster41]

550-600 hp, $20-25k

Thanks for the reply and info, a25rjr.

[President Clinton]

690-710 if you are running a steel one to meet series rules. Very expensive new but pretty cheap used.

[perfconn]

Your not going to see 690-710hp out of a convenital 23* head flattop piston 360ci engine even if you give $25,000. More like the one dude said 550 maybe 580 on a good one.

[King1]

I ran steel blocks in ky for years and the best all steel motor I had was a 436 pro action heads, 210 and 165 valves, scat rotating assembly and heads that flowed 310 at 700 lift. It went 639. The 362 I had which was the same everything just different bore and rotating assembly made 514. 10k put that motor together and that was using a 10051184 gm bow tie racing block. We won with both.

[fastford]

you can spend what ever you want on what ever type engine you want, dont mean your gone win a race though. i witnessed a fellow a few years back win several races in a row in the dead of summer with a flat top 350 with vortec heads against several 15000 dollar engines , i believe he had less than 4 grand in whole engine.

[a25rjr]

Our limiteds here in the South, usually are 360ci max, with a 23* spec head of various brands.

[LeafMaster41]

Thanks. All the intel and experience is very helpful.

[Lizardracing]

you can spend what ever you want on what ever type engine you want, dont mean your gone win a race though. i witnessed a fellow a few years back win several races in a row in the dead of summer with a flat top 350 with vortec heads against several 15000 dollar engines , i believe he had less than 4 grand in whole engine.

These are good points. Engine power isn't everything but it sure helps. Track and shape make a big difference I think.

Always some exceptions to every rule.

Local cat always known for big power and works at a machine shop. Wins almost all the races till he goes to special shows then he's mid pack. Why? Mostly over powered I think against more competition. The local tracks is hooked up hammer down and the other is stupid dry slick but 1/2 mile and very high banks.

Mullins is known to be overpriced....The same 10k gets you far less (maybe nothing!) than a local builder who enjoys the challenge more than the money.

[President Clinton]

Your not going to see 690-710hp out of a convenital 23* head flattop piston 360ci engine even if you give $25,000. More like the one dude said 550 maybe 580 on a good one.

I don't know where you race or who builds your motor, but call Cornett,Clements,Vic Hill or B&B out of Tennessee and ask anyone of them what kind of hp you can get out of 23* stuff. Your local backyard builder may not get that much, but you usually get what you pay for. Also I didn't say flat top , I said to meet the Southeastern Rules he stated. Thanks

[perfconn]

I don't need to call anybody.I have sold steelhead engines all over the country & I know what kind of power to expect out of them.Facts are you cannot & will not get 690-710hp out of a 360ci flattop piston 23* non RAISED RUNNER style head.Yes with dome pistons & RAISED RUNNER RHS cast iron heads 690-710 is possible.
You didn't say flattop pistons but the original poster specified them.

[President Clinton]

I don't need to call anybody.I have sold steelhead engines all over the country & I know what kind of power to expect out of them.Facts are you cannot & will not get 690-710hp out of a 360ci flattop piston 23* non RAISED RUNNER style head.Yes with dome pistons & RAISED RUNNER RHS cast iron heads 690-710 is possible.
You didn't say flattop pistons but the original poster specified them.

Yes he said flat top,but he also mentioned within Southeastern Late Model series that runs in Ga. Not trying to get in a pi**ing match. Sorry if I offended your ability in achieving horsepower, didn't mean to. But 690 hp with non raised runners @ 362" is achievable.I will even sell you one.

[perfconn]

You will never sell me a 362ci with Dart steel heads that will make 690hp because it's impossible unless the Dyno is cranked up.I didn't ride in on a load of turnips but you can believe all the engine builders you mentioned if you choose too.I know better,I've been building engines for 30 something years.Bet you won't find anybody else to agree with you either.President Clinton might buy one of your 690hp Dart motors if Hillary will loan him some money.

[LateModel B23]

Cannot be done. I see the SUPR spec head is allowed, have had several of those motors over the years. One of the better ones we had just happened to be built by PERFCONN. If memory serves correct it was 635hp on a conservative dyno. Another 360 flat top we had used some 49cc Iron Eagles with good port work and was 658 on gas, different dyno than the SUPR motor was on though.

As far as the SPCH heads that series allows, in 2015 our USMTS/USRA motor was a 415 with the SPCH heads. It dyno'd at 637 on alk, only 2hp more than the 360ci SUPR spec, so those heads with 55 more ci only gained 2hp.

This week we will be at the dyno with our 2 modified motors for this season, both are 400 ci. One has the SPCH heads the other has a set of Dart Pro1 230's. They are both roller cam motors and right at 14.5:1 compression. I will be happy to post the numbers for both of them and will say right now that neither is going to be close to 700hp.