The 86c is an awesome cam, specially on a 2,7ltr engine.
I would keep the 48 IDA's and not go bigger. Those 48 IDA's already support over 200 hp, which is where I think you could get with a 86c.
More porting is not neccesary, can even be detrimental for a good mixture. I had 220hp without welded ports and 46mm intake valve on a 2,7ltr, so bigger on ports is not needed I think therefore.
Better put your efforts towards a good exhaust system! There is a lot of hp to be had there on a type 4.
GL!
Walter
2700cc only 161bhp on the dyno? *UPDATE*
- Wally
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Re: 2700cc only 161bhp on the dyno? *UPDATE*
T4T: 2,4ltr Type 4 Turbo engine, 10.58 1/4 mi
www.apfelbeck.nl
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
www.apfelbeck.nl
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
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- Joined: Thu Aug 14, 2014 12:07 am
Re: 2700cc only 161bhp on the dyno? *UPDATE*
Dave I'm guessing your still using the car as a drag racing only car in the Emerald Isle .
Make sure your machinist fits the seats with enough crush, air cooled heads are very different to water cooled because of the running temps and expansion (my machinist uses .011" . You also need to get them to check the heads haven't gone soft from over heating . There is a very good book by David Vizard on porting heads , he recommends port size about 80% of valve diameter . 40mm for your 50mm valves . There is also a good thread on here as well ,search" 2.0 914 head cutaway" on the Type4rum .
Wally is right , lots of HP in the exhaust , diameter ,length and timing pipes in the collector , at least 1 3/4 primaries , approx 30 in in length .
Make sure your machinist fits the seats with enough crush, air cooled heads are very different to water cooled because of the running temps and expansion (my machinist uses .011" . You also need to get them to check the heads haven't gone soft from over heating . There is a very good book by David Vizard on porting heads , he recommends port size about 80% of valve diameter . 40mm for your 50mm valves . There is also a good thread on here as well ,search" 2.0 914 head cutaway" on the Type4rum .
Wally is right , lots of HP in the exhaust , diameter ,length and timing pipes in the collector , at least 1 3/4 primaries , approx 30 in in length .
No matter where you go , there you are !
-
- Posts: 58
- Joined: Tue Sep 23, 2008 12:41 am
Re: 2700cc only 161bhp on the dyno? *UPDATE*
These are the rods, can anyone identify what make of con rods these are? (They have Chevvy journals)
[URL=http://smg.photobucket.com/user/Adz1911 ... 5.jpg.html]
Thanks
Adz
[URL=http://smg.photobucket.com/user/Adz1911 ... 5.jpg.html]
Thanks
Adz
- Type 4 Unleashed
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Re: 2700cc only 161bhp on the dyno? *UPDATE*
They look like Crower rods. An probably originally Chevy V-8 rods, with the X7 & X8 numbering.
Richard
EMW
“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”
EMW
“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”
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- Posts: 58
- Joined: Tue Sep 23, 2008 12:41 am
Re: 2700cc only 161bhp on the dyno? *UPDATE*
Thanks for the info!
- Type 4 Unleashed
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Re: 2700cc only 161bhp on the dyno? *UPDATE*
What size are the piston pins ? Chevy rods come with .927" - 23.55mm pins originally.
And actually their not Chevy jrl's, their Buick 2.0" jrls, which is still a GM product, and what the bearings are for when you order them.
And actually their not Chevy jrl's, their Buick 2.0" jrls, which is still a GM product, and what the bearings are for when you order them.
Richard
EMW
“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”
EMW
“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”