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Author Topic:   400 stroker
Dirt Roller

Total posts: 14
posted September 30, 2005 10:55 AM  
Just wanted to know if anybody has run a stroker 400 in a mod. I am thinking about it for next year. Will be on a 1/3 mile, 1/2 tacky track and a fast high bank dry 3/8. What would you use 412, 420 ,434, 454 or just the 406. What RPM would you like to run. Solid cam, 210cc heads, forged rot. *** .

Fastride 38
Dirt Maniac

Total posts: 125
posted September 30, 2005 12:18 PM  
I had a friend who runs a 434 every now and again. He turns it around 6700. It's not any better than his 355 or 383 that he runs though.

Dirt Forum Champ
Total posts: 2007
posted September 30, 2005 01:40 PM  
I wouldnt put a lot of thought into it. Unless you use a dart block or something its kind of a timebomb anyway, thats if you can get everything to fit in a stock block to start with. With 210cc heads you would run out of air pretty quick as well.

Dirt Forum Champ
Total posts: 796
posted September 30, 2005 02:51 PM  
On gas or alcohol?

Stroking it up in cubic inches will give more torque and lower RPM, lower cubic inches like a 377 will increase RPM. As well the large cubed strokers create more torque, more stress on the bottom end. Small cubes, more RPM to get the power, high RPM equals more stress on the bottom end.

So its a toss up.

If your using 210cc runner heads, that will dicatate what direction you shold go. As well as the fuel type.

J 46
Dirt Full Roller

Total posts: 28
posted September 30, 2005 07:56 PM  
We race on Half mile tracks and if you want to keep up we found that the 420 works the best for us . Useing a 5:00 gear we turn about 7800 rpms . On the long shutes nothing takes the place of good old horse power .

J 46
Dirt Full Roller

Total posts: 28
posted September 30, 2005 07:59 PM  
I forgot to say are motor is a full roller and we run Alky and a Dart block .

Dirt Freak

Total posts: 209
posted October 01, 2005 03:56 AM  
we run a 415sbc in our late model with a standard gm block fitted with splayed steel caps on centre 3 mains. also running 210 (before porting) 23deg heads.
we have run this engine for 3 seasons now.
the heads are definitely too small at the top end. the top end cars really have something on us on the big tracks.
we have found there is not much point in turning it over 7000rpm as the heads can't flow enough. we do however turn upto 8000 on the smaller stop-go tracks.
we have purchased sb2.2 heads to upgrade, but will definitely upgrade our block for the added horsepower.

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