![gm hot cam 350 gm hot cam 350](http://www.grumpysperformance.com/factorycams.png)
Well guys, I recently installed a LT4 Hotcam into a 97 vortec motor with a ton of help from Melonhead.
#GM HOT CAM 350 INSTALL#
"5.7 Vortec LT4 Hotcam Install Pics and Information Grumpy ! Thanks again for the fantastic recommendation on the CROWER my cobra at 2.400 pounds ->is butt kickin' boys ! My snake goes like.well, torque is fantastic, (in combination with a 3000 RPM stall converter that GRUMPY said needed to be matched to the cam) and TH350 manual shifter kit. I do not care if the values itself are 100% correct, but having the same car on the same dyno, corrected by air temp & pressure should give correct relation. same as two, but CROWER CAM 471 LM added, plus block hugger headers 1 1/2 replaced by 1 5/8 and tubing from collector to H-pipe increased from 2" to 2 1/2"ġ. same as 1, but heads ported plus TRW pistons added CR 11:1ģ. ZZ3 stock engine, no mods except my Webber 48 IDF carbsĢ. peak dates first, tables & images follow laterġ. Here you can see torque and hp of three stages of modification. I'll be at the dyno for final adjustment in 10 days. if you hit the pedal the Webbers start screaming like hell.
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Engine feels like it would be a new one, runs extremely soft when cruising.īut boy. The idle is quite smooth, idling at 600-700 RPMs. I got a recommendation from grumpyvette for a crower cam, ( remember something like 00471 ) Heddman hot rod headers 1,5" primaries leading in 2" collector, opening to 2,5" tubes and Edelbrock RPM mufflers Ignition is MDS 6AL with electronical pickup, no vacuum. 30 overboreTRW pistons L2304F30 ( should give CR 11:1 accd to engine shop )
#GM HOT CAM 350 HOW TO#
( cranking pressure was 175psi before, now it is 215psi )Ĭan somebody give me a recommendation how to move forward ?My goal is rather to get low end torque than high rpm power. Now I read a lot about adding a hotter cam ( later ABDC seems to be the issue ) to bleed off pressure could solve my problem. ( 98 octane fuel used already ) This did not really give the hp I expected Engine lost lots of low end response / torque. We had to retard ignition down to 4� idle and 23� max advance above 3500rpm to get rid of knocking. Two weeks ago I went to the dyno where we experienced a clear detonation starting 4000rpm. I just got my chevy ZZ3 rebuilt.The engine shop did some porting work to the ZZ3 heads and added domed TRW pistons (CR11:1) overbore.