hi Imo in the middle of building my 5k for my ke20 just for abit of fun on a rainy day...

 

the work ive done to it is-

 

fully balanced, blueprinted bottom end, new conrods all new bearings etc, new 40thou oversized pistons block has been decked out don't know how much, head has been shaved to a very minimum , ported n polished head, max i could go, match ported manifolds with twin 40s and a lighted flywheel extractors and a 1.75in pipe with a HD excedy clutch!!.

 

ok the cam is unknown now thats what is going to make the horsepower. if its not right for the engine then I'm f@$ked so I'm taking a risk!! i was told when i got it was the biggest cam for the streets just under a race cam, i just got it and didnt think it would of gone this far with the engine...

 

 

ok so now i would like your feedback on what you think and what est. ill be getting on the dyno closest to it gets to wrap a helli :P

 

it will be getting dynoed in the next 2-3weeks

Edited September 22, 201016 yr by ke20 king

76rwhp

75-80 RWHP. If you're lucky. Exhaust is a bit small. What chokes in the Webers? CR? Fuel?

 

J

75-80 RWHP. If you're lucky. Exhaust is a bit small. What chokes in the Webers? CR? Fuel?

 

J

 

Ditch the 1.75 and go for a 2" system

65rwkw :hmm:

mine made 68rwkw with rather high comp, over 11:1. can't recall exactly I have my build calcs somewhere.

 

I also have a big mystery cam (hence I get away with that comp) I don't know proper duration specs but it runs .480 inches of lift which is big.

 

The comp is the main reason I make that power and I'd have problems if I went for a milder "street" grind cam.

Edited September 23, 201016 yr by philbey

yeah I'm going 4 a 2in now i was think around about the 70-80hp range if I'm lucky i really need to find the spe of the cam

 

the chokes are 32 and the main jet is 138 any good

 

cheers

chokes will be fine, don't worry too much about the jets if you're going to the dyno tuner, let them sort that out.

32mm's should be right. some people go 28's, but thats a bit small if you want to make Hp. Min 2" exhaust, 1.75 is too small. It'll be a nice little package.

 

Can't remeber what my main size is, but it's probably somewhere around there.

Edited September 23, 201016 yr by Redwarf

by the way

 

how do u work out your comp ratio

very crudely, you need to determine

- volume of your piston dish

- head combustion chamber volume

- bore x stroke (Swept volume)

 

this calculator is a simple one:

http://www.csgnetwork.com/compcalc.html

 

Better calculators will also look at crown to ring distance, diameter at top ring, diameter at crown, etc.

 

You really should work this out, I ended up with very high compression because the only new pistons I could buy had a much smaller dish in them than the factory ones (9cc instead of ~21cc).