my lsx build 444 cid need cam help
03-09-2015, 01:56 PM
#1
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
my lsx build 444 cid need cam help Hello need a little help here. Car 68 Camaro (pro touring all Speed Tech suspension, big brakes etc.....) Engine 444 cid LS. Gm LSX block, Bore 4.155, stroke 4.100, rod 6.125 compression 11.2, Trick Flow heads Gen X 255, 69 cc chambers. Quench set at .042. fuel injection Holley Dominater, pump gas.(93 oct) Question, Cam shaft, My machine shop had a custom ground cam done for the use of the car. Street, a little auto cross, drag strip once in a while, cruise nights, etc. 5speed trans (Legend) non power brakes. Problem when I plug the cam spec into a dynamic calculater the number appears all wrong to me. 9.18:1 Talked to the cam guy he does not really know what to say as he said no one ever talks to him about dynamic compression. He says according to his experience the cam will work well. I talked to the machinist and he swears by the cam guy as he does mostly race motors and races himself. (his motors are always fast and hold together, he has many wins and some track records, circle track) Cam specs are intake valve lift .6563, (timing spec at .050) duration 244, timing 12.00 and 52.00, C/L 110 TDC .151, Exhaust .6375 lift, Duration 252, Timing 64 and 8, C/L 118 TDC .126, Cam lift is intake, .3750 TDC .086, Exhaust .375, TDC .074, Rockers are TD shaft mount 1.75 intake/1.7:1. am I plugging things in wrong? advice? someone I can maybe call and chat with... etc. thanks Ken
Last edited by partsguy57; 03-09-2015 at 06:09 PM.
.....this guy has obviously been throwing cams at engines....for years....and has come to understand what generally works (or not) without understanding why.
03-12-2015, 10:37 PM
#5
TECH Fanatic
iTrader: (10)
Join Date: Mar 2011
Location: Miami gardens FL 33055
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
Go to this man pay $25. and fill out his questionnaire and be done with, I just fill one out today you'll be glad you did, I wouldn't do it any other way.
http://www.guerragroup.com/#!camshaft-help/c1mq5
http://www.guerragroup.com/#!camshaft-help/c1mq5
03-13-2015, 11:08 AM
#6
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
thank you for the reply's and info. One of the Cam company's mentioned in the posts sent me a email with a phone # to call and chat with him and after talking to him the cam I have will work well with my combo. Thank you!!
Trending Topics
03-13-2015, 11:58 AM
#8
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Hello, What is so obvious to you, not so much to me. What is obvious is my machinist has state of the art equipment is a "old guy" and has been racing since I was a kid (I'm 48 now) and does nearly only race or high performance motors and his stuff is always fast and does not come apart. ( I owned a auto parts store for many years so you hear all the good and bad) When I told him what I wanted done as far as machine work(I will do the assembly) and asked him what cam company to go with. (meaning one of the large "name brand ") He said no, have a custom grind done for the engine based on the use of the car etc. etc. The cam guy he uses has done cams for him for years and has never steered him wrong. My concern was when I asked him why the numbers using dynamic compression seemed funny, he said he has never messed with that sort of info and didn't really know what to think about it. His attitude was I pay the cam guy to get the job done as far as that goes. He also said looking at the cam specs and based on his experience, he thought it would well. I Then called the cam guy, very nice to chat with but, he said no one ever brings up dynamic compression and based on his years of experience and my info the cam will work well. He could throw out all kinds of tech stuff and sound good, but as far as dynamic compressions numbers go he does not mess with that and did not have much to say about that. I then posted here for some info looking for a little clarification (thinking it was probably me messed up on my thinking) and one the posters listed a group of cam company's and one of those guys sent me a email and a phone number to chat with him (thank you!!). In a nutshell what was said is(these are my words not his),1 be very cautious of dynamic compression numbers as they are far to simplistic to put much stock in. 2 the cam will work well with my combo and no reason to make a change.( I said I was open to paying for another cam) so it appears as you said in your post the cam guy got lucky with his "cam throw", or maybe all involved were correct and my concerns were unfounded. Being as I am the least "smart" as cam design goes I don't think it was a lucky "cam throw" as you stated, but I could be wrong. I like to check things out as I have learned and having seen after being in the parts business for many years that mistakes can be made and you always check everything out. I feel that if you are assembling the motor you are responsible for the final product so double check all clearances, parts, etc Ken
03-14-2015, 08:16 PM
#9
......so it appears as you said in your post the cam guy got lucky with his "cam throw", or maybe all involved were correct and my concerns were unfounded. Being as I am the least "smart" as cam design goes I don't think it was a lucky "cam throw" as you stated.....Ken
Take a deep breath, get the knot out of your panties and read my post again.
But if you can show in my post where I stated that he could not pick out a cam that works, I'd like to see it.
KW