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Author Topic:   engine size and horsepower
nice_guy_wi
Member
posted May 10, 2003 01:48 AM
What size engines do you guys run in your mods? And ballpark figures for horsepower. And why not throw in ballpark rpm's.


racer17j
Member
posted May 10, 2003 09:32 AM
full roller 383 635 hp turns 7200 only problem is it's about 350 more horse then the old 92 shaw can hook up


Pickel
Member
posted May 10, 2003 10:10 AM
most guys around here run any thing from a 406 to a 434.. I have seen many 406 out run the bigger motors..like racer17 seid you can only hook up so much of that power o

[This message has been edited by Pickel (edited May 10, 2003).]

Racer14K
Member
posted May 10, 2003 10:33 AM
400 roller at 7800 rpm


jhon hollomon
Member
posted May 10, 2003 10:33 AM
Where I race I regularly see 355's and 383's mopping those 434's and 406's.


zeroracing
Member
posted May 10, 2003 01:44 PM
Where do you run mod75d. It must be tacky! Quite a gamble with a 550 claim.


mod4
Member
posted May 12, 2003 08:46 PM
377" @ 565hp, max RPM 7400, Intake to oil pan built it for $5800 bucks, ran 44 races last season with 39 top 3's.

Got accused over the track PA system by another driver of "being one of the $12,000. motor guys" .. walked up, grabbed the mic and offered to sell him my motor and an exact twin for that $12,000. He went away pretty quick, and I made sure to nerf him when I lapped him later that night.



tilley88
Member
posted May 13, 2003 12:59 AM
Alot depends on where you race and track surface, tires, etc. Within 1 hour, I can go from UMP to IMCA. UMP-600 plus hp, IMCA-600 & under. That's a generalization. I'm sure the numbers sway with the checkbook. Alot of guys can hook up 600 hp on Hoosiers or McCrearys, but some are faster with less power. Pick your poison!


Wauge28
Member
posted May 14, 2003 03:40 PM
Am I the only one who calls bull on the 792 HP? No hard feelings mod75d, just sounds like desk top dyno numbers to me


zeroracing
Member
posted May 14, 2003 03:46 PM
Most late-models don't have 792hp. I know we all hear 850-900 hp, etc. It's BS. Results vary from dyno to dyno and operator to operator. I think someone is blowin smoke up yer bunghole.


dirtbuster
Member
posted May 14, 2003 06:21 PM
I could see that much HP in a late model and as mod75 stated in another thread that is what he originally built it for. BUT, dropping that in a modified seems ridiculous. I would think he would have spent 15-20,000$ dollars to build that motor and for what? about 250-300hp (not to mention several thousand dollars)is wasted because it is just overkill. I have a hard time beleiving you can hook up 800 hp on 8" tires no matter how tacky the track is.


outlawstock17
Member
posted May 14, 2003 07:53 PM
i'm with wauge28. mod75d, 792 hp? gimme a break! i didn't just fall off the turnip truck! i'm highly skeptical of that number. you're in winston cup and WoO territory with those kind of numbers. that kind of power is useless on a dirt track with an IMCA type tire. God would have a tough time hooking it up!

[This message has been edited by outlawstock17 (edited May 14, 2003).]

Donnie Ross
Member
posted May 14, 2003 08:35 PM
don't know how much i've got but the tires will spin if not very careful so its enough for me.


MOD75D
Member
posted May 14, 2003 09:12 PM
I had a 383 that I put on the dyno last spring that sang a chorus about 628 horses. It scattered itself in a heat race trying to beat Willie (another forum member) to get the heat win sticker and the extra money put up to win the heat. I liked to turn it about 7200.

Greggie

MOD75D
Member
posted May 14, 2003 11:08 PM
MOD75D, no need to say you are sorry. I think by your response you seem like a good guy. Now the guy building or atleast dyno'ing your motor...that guy is the one smokin the good stuff. Dyno's have many adjustments that can show an engine owner anything he wants.

Here is a fact. My 421 has all the good stuff. $ 12 to 15K with alum. heads, roller everything and light everything. I might get 640 to 650 on a good day.

Aren't NASCAR motors over 100K and they strive for 800 hp.

MD
Member
posted May 15, 2003 02:04 AM
**** Mark, I can't believe your running that against our flat top 355 hydraulic 5 year old claimer engine with stock GM heads and home made longslots. LMAO!

Good luck in Chico.

[This message has been edited by MD (edited May 15, 2003).]

sdhnc29
Member
posted May 15, 2003 06:21 PM
792hp is very possible for a dirt late model 417ci engine . But generally when you get to these power numbers from a Chevy engine your using SB2.2 heads , 16 degree Dart heads , or some very big 18 degree heads . The SB2.2 engine in my own dirt late model is a 357ci engine with 774hp and 562ftlbs of torque . But for something like this your looking at $28,000-$30,000 .

If MOD75D has a 23 degree engine , and his dyno sheet reads these power number's , then the dyno operator falsified the dyno figures (which is easy to do for the dishonest engine builder) , or this engine has such a large cam that it will show a high HP number with little or no torque (very common for some engine builders since most people are impressed with HP numbers). The lack of torque would probably not be noticed in a modified , but it would show up for sure in a late model . A good running 417 should be producing around 650 ftlbs of torque or more depending on the exact combo used (heads , cam , gas/alky etc. etc.).

Steve

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


Wauge28
Member
posted May 18, 2003 08:32 PM
OK, I'll buy that...but, do you run a dry sump with some sort of oil cooling? That many ponies are gonna run hot with a wet sump/no oil cooler.


nice_guy_wi
Member
posted May 19, 2003 10:27 PM
Pretty much what I expected to see. Everything under the sun. I have a friend that runs a mod. And from the stands looks like he can NEVER hook the thing up. He runs a 406 at 730 horse he says. Straight aways at the track we run are black all the way down them half the nights when it really gets warm. I am thinking a 355 or 383 may be better in it myself.


Dirt-Tracker
Member
posted May 20, 2003 09:31 PM
Ford 347----have no idea on HP. Dont really care.......it has more than I need at this point in my young career.


uforacing51
Member
posted May 21, 2003 11:50 AM
I decided on a 406 and it has 400+ on the horsepower. (desktop) I probably have less HP than the guys I run against but I am still sorting out the handling too. I believe that the handleing is more important than the HP. At the track I run at, he always lets it go dry slick, ahhh the great equalizer.


hiredgun
Member
posted May 21, 2003 01:42 PM
wish i had half the money you guys spend on engines,i'd have 20 claimers sitting in the shop ready to run.camel back heads,202&1.6 victor intakes,12 to 1 pistons,#7 midwest cam,and on a really good motor,roller rockers and a claimer stud girdle make one huge engine in central iowa!!!!!!


Dustejr73
Member
posted May 30, 2003 03:54 PM
Race the track…not the dyno…

Cubes in the 350-370 range and HP in the mid fives are typically the best applied numbers for this type of duty…if the goal is to make the best raceable power…
Most of the other combinations sacrifice too much of something somewhere and the huge power motors wind up being tamed anyway…and the big stroke motors often sacrifice the broader power range offered by longer rod ratios…use up induction/exhaust systems up earlier in RPM…and live a more stressful life in general…
Big HP small motors have the same “peaky” power curve problems only at higher RPM…
Ya gotta remember the majority of chassis “adjustments” used to get a high power car to hook in/out of corners are allowing the chasses to absorb power and soften the torque curve to the wheels…
In my opinion…especially being a motor guy…it’s easier to start with a broad power and acceleration curve…and tune power into/out of the motor…and avoid potential chassis tuning headaches…obviously there’s a strong possibility of the chassis gurus out there having an opposite opinion…lol…but if I can get a car to work with 5 minutes and a timing light vs 5 possible chassis adjustment options (for me) to ***** up…I’m taking the simple route…which is often the less expensive…Rascal


Wauge28
Member
posted June 02, 2003 07:06 PM
Sorry Dave, I meant 217. It is an Audi 5 cyl that is punched out with Cummins rods and pistons.


younggunms
Member
posted June 15, 2003 01:19 PM
I run a 406 because I have it set up for great mid-range torque, but I see a lot of 355's and they win a lot of races!


rocket36
Member
posted June 15, 2003 01:40 PM
we run a 415sbc in our late model but now that i have built one, i think next time i would go 383 or 372. similar torque and horsepower but parts are cheaper and easy to obtain.


GO 24
Member
posted June 16, 2003 12:09 PM
At least here anyway, all you see is 355's with a few 406's running around. HP is overrated when your sitting on top of those spec tires and can't get anything to bite past 500 or so. When your talking about 550 to 750 ponies your also talking about alot of $$$$ for a claimer class?!?!?! No thanks.
I've worked with my engine builder for years and he's very reputable, out of curiousity I asked for ballpark dyno numbers for some of the IMCA mods engines he builds and it's in the range of 450 to 500 tops. I personally drive a late model so it don't matter much to me but don't let people blow smoke that their runnin those kinds of #'s in a claimer class if that's what their in. $20k motor for $500 to win ya right.


GO 24
Member
posted June 16, 2003 12:18 PM
I forgot to mention, MOD75, I don't want to debate what yours has or doesn't have but I'd keep everything about it confidential if your running a claiming class or it'll be gone---**** I'd rent a mod for a night to get it for $500! If your running unrestricted rules than no big deal.