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Author Topic:   big bore short stroke
regal 22
Dirt Full Roller

Total posts: 28
posted September 04, 2005 06:25 AM  
the track i race at is changing the rules next year, one of the rules limit displacement to 360, I now run a 377 with a bunch of money tied up in it, my engine builder suggested keep the 400 block and put a 327 crank in it, that will net 358, can this combo have an advantage over a bored out 350?

Dirt Maniac

Total posts: 137
posted September 04, 2005 07:43 AM  
that will make smooth power, the torque and hp numbers on a dyno come out really really close to each other in the rpm band.

you need to spin that combo so if your running a limited carb it wouldnt work well at all.

We built one for a pavement late model really lw crank etc. peak hp and torque were right around 6800, so thats what we needed to gear it for coming of the corner, that put it at 8500-8800 and the end of the straights. It worked well but it was also a 14k motor.

regal 22
Dirt Full Roller

Total posts: 28
posted September 04, 2005 09:46 AM  
the track is also allowing roller rockers and headers next year, but is still limiting to a q jet and they also banned bowtie heads, must use stock heads, my engine builder is concerned about making power with stock heads,any comments on good flowing stock heads, also i should mention I run an outlaw stock class with a $1,000 claim rule.

nine finger
Dirt Forum Racer

Total posts: 76
posted September 04, 2005 11:38 AM  
the short stroke will work really well with stock ported heads.if everybody plays by the rules you should be ahead of the game.

Dirt Freak

Total posts: 205
posted September 04, 2005 12:27 PM  
As stated above, to get what it can give, you gotta spin the **** out of it, and for it to stay together you aint gonna be anywhere near the 1K area. Not even close. it will do what you ask it just takes the almighty green.......
Speed costs..... how fast can you afford to go...??

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