power results on a 5 horse?

[70stage1]

was wondering, what power you can expect from a built 5 horse flatty
lets say

light porting (polishing to match)
billet rod
billet flywheel
CDI
header
0.10" over new style piston (of course chrome gets ya home)
20 pound valve springs with newer style retainers
mild cam (94ss grind)
copper head gasket 0.26"
copper intake-exhaust gasket
TEC carb with intake
looking to make 5500-6000 rpms

 

[CarlsonMotorsports]

Depends on whose dyno you use.
Not sure what the TEC carb is, but assuming it's .750" or so,
12.5CHP would be expected ~5200 rpm.


-----
Thanks and God bless,
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Carlson Racing Engines
Vector Cutz
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34 years of service to the karting industry ~ 1Cor 9:24
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765-339-4407
bcarlson@CarlsonMotorsports.com

 

[70stage1]

tec carb 640084

(should pop up)

 

[70stage1]

just had it laying around and a intake to fit, so
easier then spending the money on a vm22

 

[Colt sr]

So you plan to use an stock tecumseh hs50 carb?

 

[70stage1]

So you plan to use an stock tecumseh hs50 carb?

yep, had like 4 laying around that are brand new in the box

 

[70stage1]

yep, had like 4 laying around that are brand new in the box

if it doesnt run well,ill just buy a vm22

 

["J'-remy]

realistic HP on a GOOD WKA stock flathead is 8.10 HP Limited modified is around 12.6 HP

 

[flattop1]

I was sorely disappointed when i took my sa flatty too the dyno .

 

["J'-remy]

I was sorely disappointed when i took my sa flatty too the dyno .

did it make it less fun?

 

["J'-remy]

3/4 into the last race I was in I could barely hold my head up because of the Gs around the corners. my little .070 over limited flathead feels like a rocket ship. Bud Wilson is working on my open flathead and im getting scared just thinking about driving it.

 

[flattop1]

did it make it less fun?

Nope . That Engine won a ton of races .

 

[Petty Race Engines]

3/4 into the last race I was in I could barely hold my head up because of the Gs around the corners. my little .070 over limited flathead feels like a rocket ship. Bud Wilson is working on my open flathead and im getting scared just thinking about driving it.

My @$$ will almost fit in the seat again… just saying

 

[Chipg56]

tec carb 640084

(should pop up)

The larger Tecumseh carbs (8-10 HP.) such as the 640349 have the same bolt pattern as the small ones. With that cam I am sure it could handle it. You do know that you can get China copies off e bay for well under $20.00? Are you using an old Briggs manifold such as the 691922 or an aluminum?

​

 

[XXX#40]

I was sorely disappointed when i took my sa flatty too the dyno .

But man it sounded good with that dog bone header......

 

[XXX#40]

3/4 into the last race I was in I could barely hold my head up because of the Gs around the corners. my little .070 over limited flathead feels like a rocket ship. Bud Wilson is working on my open flathead and im getting scared just thinking about driving it.

Did you ever see that open animal Jerry built for Clint Bower and that Harvick kart race?
2 smoker pipe....

 

["J'-remy]

Did you ever see that open animal Jerry built for Clint Bower and that Harvick kart race?
2 smoker pipe....

nope. was that easier than making a reverse cone megaphone?

 

[Samotorsport]

Always wondering what the jr dragster engines a giving out , I was wondering what kind of dyno can be used to measure this .
I would love to have a little dyno up to 55 hp or so to see the outcome of my work