[Line_up101]

I have a destroked shortblock that i got in on some trading 4.155 Bore with 12.5 domes on a 64 cc head. Do these motors make decent power/torque it is going into a 1/8 mile heads up car that weighs aprox 2700 lbs

 

[1997bird]

What kind of rpm are you looking to turn? With proper gearing to match the rest of the combo you should be pretty quick.

 

[Line_up101]

65 to 6800 will be fine 5.14 gear with a 29.5 slick and glide

 

[steel town]

wouldn't be my first pick . Why take stroke out of an engine .With that said it'll still make power with the proper parts but your gonna need more RPM with the shorter stroke .

 

[Fisher-Racing]

377 works great if you have the parts to turn it, you might have to get off that 6800 Rpm limit more like 8800 RPM
these motors like gear and alot of it
the short storke big bore motors make great power but they like RPM and good heads

 

[Line_up101]

I just dont want to tear a good shortblock apart just to use the block. The heads that i have are the aluminum bowtie raised runner 10051101's and the motor will be on alcohol the only problem i would have with gear is i haven't found anything steeper than the 5.14s for the ford 8.8

 

[silverbullet]

That combo is going to like RPM.. 6800 isnt going to cut it..

What parts are in the short?

 

[Line_up101]

steel crank with billet caps, scat h beams, and the older trw forged pistons

 

[69decvr]

Sell it and put the money towards something that will work better for you. Just a thought

 

[silverbullet]

What block?

 

[Line_up101]

509

 

[69camaro434]

I have a friend that has a 377 sbc 509 block in his '80 Camaro he spins it 8000rpm, been in his car for over 20 years.
Has very good parts, stick shifter, runs high 11's all day 1/4 mile.

 

[us7race]

My old 377 I ran in the 6500-6800rpm range. It didn't really pick up any with RPM. I think the cam left alot on the table but still ran good. Motor best pass was [email protected] at 2800 lbs then. Normally ran 6.40 or so on Race fuel.
How fast you plan on going? about..>?

 

[Line_up101]

My goal was around 6.60 maybe 6.50's

 

[1997bird]

If you cam the engine right you can help make up the TQ loss from the shorter stroke and keep the engine around 7200 rpm. A reverse split cam will help you have a stronger mid range TQ power band. I would suggest a cam along these lines to help you make the most of the TQ range from the shorter stroke: 286/282 advtized dur., 260/256 @.050" dur, 181/176 @.200" dur, 107+5, .675"/.645" w/1.5 rocker's. That should put your power band around 3800-7200 rpm.

 

[us7race]

My goal was around 6.60 maybe 6.50's

Should easily run that on alcohol. The cam I ran is a howards solid roller 264/274 .635/.630 lift on 110
I run 4.88 gears and still kept it under 7,000 more like 6500 at the stripe. Any idea's of what the heads flow? What size runners?

 

[Line_up101]

I have a set of aluminum bowtie raised runner heads i figure they should be around a 210 since they have been ported tremendously with 2.10 valves and small chambers I cannot exactly recall but i believe they have either 55 or 56 cc chambers the compression on them should be atleast 13.5 or maybe higher and i have thought about trying a set of the profiler heads

 

[doublesperformance]

I had a 377 with a set of 235cc Pro Topline heads on it. It was a great running little engine. It didn't really like a lot of RPM like I suspected it would. It ran its fastest when shifted around 6800 rpms. It ran consistent 6.40's in the 1/8th at 3250lbs.

 

[hilton]

has anyone ever tried one of these with a 18 degree cyl head it seems big bore short stroke needs more rpm was thinking of trying one of these combos ?

 

[Dentonmotorsports]

I had a 377 with a set of 235cc Pro Topline heads on it. It was a great running little engine. It didn't really like a lot of RPM like I suspected it would. It ran its fastest when shifted around 6800 rpms. It ran consistent 6.40's in the 1/8th at 3250lbs.

Did the pro toplines have port wotk done? Where was your cam set to come on at?