Engine Re-build (2nd thread)
#1
Engine Re-build (2nd thread)
I've decided to go with having Elliott Portworks do my head porting and intake porting. Instead of the LT4's I've decided to just have a pair of LT1's ported along with a stock intake. I was told that the LT4 heads just have bigger valves and if I did have them ported that the valves would be way too big and I wouldn't see the gains I'd see if I just had my LT1 heads ported...so...
The LT1 ported heads will be running ~200cc at ~275/190 for $1,200. The LT1 intake will be ported to accept a 58mm TB for $100. Instead of going with the CC306 I was advised to go with the Xtreme 230/236 cam, which I was told is a much more 'streetable' cam. It powers from ~1500 all the way up to 6500 rpm's. About .112 lobe separation from .540 - .560. Comp Cam R Magnum 1.6 riller rockers will still be used and Lloyd, for $1200, will be adding everyhting else to the heads to make them a simple bolt-on after he's done.
Elliott also provides a bench test, one for the stock LT1 heads I'm sending and one for the ported LT1 heads when he's done. I'm supposed to find hp from 360-380rw after all is said and done.
Anyone like this set up?
The LT1 ported heads will be running ~200cc at ~275/190 for $1,200. The LT1 intake will be ported to accept a 58mm TB for $100. Instead of going with the CC306 I was advised to go with the Xtreme 230/236 cam, which I was told is a much more 'streetable' cam. It powers from ~1500 all the way up to 6500 rpm's. About .112 lobe separation from .540 - .560. Comp Cam R Magnum 1.6 riller rockers will still be used and Lloyd, for $1200, will be adding everyhting else to the heads to make them a simple bolt-on after he's done.
Elliott also provides a bench test, one for the stock LT1 heads I'm sending and one for the ported LT1 heads when he's done. I'm supposed to find hp from 360-380rw after all is said and done.
Anyone like this set up?
#3
Originally posted by Serial Thriller
Any second now, Ken will move this to LT1 Tech.
Any second now, Ken will move this to LT1 Tech.
And FacelessZ here is my dyno chart with that xe cam and ported stock heads.
#4
Originally posted by kmook
I see how it is im the bad guy, Fred isnt
And FacelessZ here is my dyno chart with that xe cam and ported stock heads.
I see how it is im the bad guy, Fred isnt
And FacelessZ here is my dyno chart with that xe cam and ported stock heads.
Nice Dyno! What other mods did you have with that?
I also have my heads ported, with headers but I was thinking of the less radical XE224/230 (Combination Motorsports 224XL) How much less HP would I be looking at?
Ben
#10
That's going to make me change my cam. That's 30 or so hp more than I was expecting from the 224/230. HP peak is around 6200rpm too. I went smaller becaue I thought you had to rev that cam to 6800 or so to get it all out. Torque comes on at 3000rpm too. Awesome.
Are you an A4 guy? running stock convertor? how are the brakes?
Thanks for the reply
Jeff D.
Are you an A4 guy? running stock convertor? how are the brakes?
Thanks for the reply
Jeff D.
Last edited by PoorMan; 06-18-2003 at 08:05 PM.
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