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Author Topic:   need advice on motor
pbrcowboy2
Dirt Freak

Total posts: 380
posted July 07, 2005 09:25 AM  
I just bought my first "race" engine and wondering who all has raced this motor.

3 9/16ths stroker motor.

i do have to put this together tho!!

-350 4 bolt block
-line bored
-bored 30 over
-1182 steel forged crank
-cranks been balanced
-L2278 30 over .193 forged dome top pistons
-has a 280-h comp cam but will sell 4 cheap
-it now houses my number 7 midwest cam
-rods look stock but they r not guy said they were hardened rods
-rod bolts look wierd they have small indentation at bottom of bolt
- pistons and rods are put together already

-441 heads bolt ready to go
-shaved dont know much...... but shaved
-studs r pinned
-.500 lift valve springs
-2.02 valves
-1.6 valves
-new valve guides

guy was moving told me he didnt have a shed to keep this piece in so he sold me this thing 4........ $150

I have never heard of this motor tho and wanted folks opinions about this motor should it make pretty good power? how many rpms can i turn with this safely 7500 to much?

leapinlizard
Dirt Freak

Total posts: 402
posted July 07, 2005 10:26 AM  
L2278?

somthing looks weird hear. I couldn't find a maker from the part No. but it looks like a .030 TRW No.with a 1.56 CH. You might make sure I'me wrong.

pbrcowboy2
Dirt Freak

Total posts: 380
posted July 07, 2005 10:37 AM  
plain as day L2278 .030 on top of piston!! But i did find that number ina 2000 sealed power piston catalog it is a forged piston i called sealed power they do not make that piston no more......but if i wanted i could go flat top with this!!!

these were really expensive pistons i guess from what sealed power told me.....none the less this motor is really really nice just hope its safe to 7500rpms!!!

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted July 07, 2005 12:48 PM  
Sounds alright but I'd be weary of the rods, and the crank will break eventually since it isn't cast, the GM Steel cranks are real crack and break prone. Sounds like something I'd want to tear apart and have checked over, and get legal pistons in.

sc1 racing
Dirt Freak

Total posts: 419
posted July 08, 2005 12:21 PM  
ive been running a steel gm crank for 4 years in 6 diff blocks. it has turned as much as 8200 rpm lived through 3 broke rods and2 spun bearings. it is now turned 30/40 and still running strong.

dont get me wrong anything will break, but cast will never make it long. not over 6 grand it wont..

your engine combo ought to make you a nice peice, but id upgrade to a good set of scat rods..

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted July 08, 2005 01:15 PM  
GM Steel Cranks are fragile. We run Cast GM 20/20 or Scat Cast 9000 Series STD STD and turn around 7000 nightly. We don't break cranks or rods, just break top end stuff now and then. Cast cranks work better than a GM Steel because they flex, the GM Steel will just plain break. When clearanced right, any crank will work and live a long time.

Kromulous
Dirt Forum Champ
Total posts: 796
posted July 08, 2005 01:21 PM  
The 9/16ths motors run good, we got ours done late in the year, but its been good since. The combination seems to be torquey.

I would like to try a 9/16ths stroke in a 400 blk, i bet that is real nice.

pbrcowboy2
Dirt Freak

Total posts: 380
posted July 08, 2005 05:04 PM  
later on if i prefer could i use flatops ya think? the rods in this i forgot to mention are not oem rods they look like stock at first but they are not the guy didnt no what kinda rod name they were but said they were hardened rods was all he knew

[This message has been edited by pbrcowboy2 (edited July 08, 2005).]

nailngoracing
Dirt Maniac

Total posts: 170
posted July 08, 2005 11:10 PM  
if you only paid 150 for it...everybody probably ran it!!

nailngoracing
Dirt Maniac

Total posts: 170
posted July 08, 2005 11:14 PM  
i'm turning a cast crank with heavy cast pistons, stock rods with stock rod bolts....7200 rpm...i have about 13 features on it!

cast seems to be more forgiving

pbrcowboy2
Dirt Freak

Total posts: 380
posted July 09, 2005 07:22 AM  
this motors never been in a race car the guy no nuthin about racin he bought it from his best friend who found out he over built it. then the guy i bought it from only had 1500 miles on it took it out cause he said it would get away from ya. So now hes moving to a new house that has no garage yet and he doesnt wanna carry it around in his truck forever so he said he like to see someone use it for what it was intended for.

Because the heads are milled is it easier to have the block milled down or the intake which way do i wanna go with this

[This message has been edited by pbrcowboy2 (edited July 09, 2005).]

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