what to do heads and or cam
03-02-2005, 07:31 AM
#1
Instructor
Thread Starter
Member Since: Jun 2004
Location: durham nc
Posts: 216
Likes: 0
Received 0 Likes
on
0 Posts
what to do heads and or cam
ok i have a pretty much stock 93 and i have a few ?i know im going to probably get my heads from elliott's,i will be doing mostly street driving and i dont want to have to worry about idle or any problems like that it still needs to be a reliable car,im tring to get around 400 rwhp out of the car
1-can i do it without replacing the cam and if i can will it help much with hp
2-can i replace the cam with out taking the engine out
3-on elliots page the lt1-le1 saids some where between 379-390 rwhp and for the lt1-le2 400-420 rwhp does these number seem about right to anyone
4-last on his page it looks like to get them numbers i would have to replace the injectors 30/36, 52/58 throttle body how much would this cost and what kind of numbers if i dont do this when i do the swap
and if i do this is there any thing else i should do or is a good idea to do at the same time
soyy if i confused anyony one i think i confussed my self ,thanks for any input or suggestion
1-can i do it without replacing the cam and if i can will it help much with hp
2-can i replace the cam with out taking the engine out
3-on elliots page the lt1-le1 saids some where between 379-390 rwhp and for the lt1-le2 400-420 rwhp does these number seem about right to anyone
4-last on his page it looks like to get them numbers i would have to replace the injectors 30/36, 52/58 throttle body how much would this cost and what kind of numbers if i dont do this when i do the swap
and if i do this is there any thing else i should do or is a good idea to do at the same time
soyy if i confused anyony one i think i confussed my self ,thanks for any input or suggestion
03-02-2005, 08:26 AM
#2
Cam should be picked to match the rest of the engine combo. "I" would never swap cam only if head upgrade was in the near future. The cam should be matched to desired rpm band, compression, head flow, gearing, vacuum requirements and physical limitations such as piston to valve clearance, spring bind etc. The cam is one of the final tuning aids of the motor. In a perfect world the cam and heads are done together. A cam can be swapped in the car in every year c4. It is a job though. When I am that deep into it, I usually pluck the motor and put it on a stand. If you are paying a pro labor, let him decide which way is better (cheaper).
Edit, I misread your question. You asked if changing heads and not cam is ok. I repied as if you asked the opposite. My mistake. If you cannot do both together, my opinion is do heads and down the road do the cam.
Edit, I misread your question. You asked if changing heads and not cam is ok. I repied as if you asked the opposite. My mistake. If you cannot do both together, my opinion is do heads and down the road do the cam.
Last edited by Pete K; 03-02-2005 at 08:30 AM.
03-02-2005, 08:29 AM
#3
Le Mans Master
Originally Posted by raw122
ok i have a pretty much stock 93 and i have a few ?i know im going to probably get my heads from elliott's,i will be doing mostly street driving and i dont want to have to worry about idle or any problems like that it still needs to be a reliable car,im tring to get around 400 rwhp out of the car
1-can i do it without replacing the cam and if i can will it help much with hp
2-can i replace the cam with out taking the engine out
3-on elliots page the lt1-le1 saids some where between 379-390 rwhp and for the lt1-le2 400-420 rwhp does these number seem about right to anyone
4-last on his page it looks like to get them numbers i would have to replace the injectors 30/36, 52/58 throttle body how much would this cost and what kind of numbers if i dont do this when i do the swap
and if i do this is there any thing else i should do or is a good idea to do at the same time
soyy if i confused anyony one i think i confussed my self ,thanks for any input or suggestion
1-can i do it without replacing the cam and if i can will it help much with hp
2-can i replace the cam with out taking the engine out
3-on elliots page the lt1-le1 saids some where between 379-390 rwhp and for the lt1-le2 400-420 rwhp does these number seem about right to anyone
4-last on his page it looks like to get them numbers i would have to replace the injectors 30/36, 52/58 throttle body how much would this cost and what kind of numbers if i dont do this when i do the swap
and if i do this is there any thing else i should do or is a good idea to do at the same time
soyy if i confused anyony one i think i confussed my self ,thanks for any input or suggestion
Your cam selection is going to be critical since you're concerned with idle, etc. The cam will have to be kept on the conservative side to maintain a good idle; I'd say no bigger than 218@ .050
There's another thread going on right now on heads, so take a look at it for some ideas and comments. What you'd need, though, are heads that have good, high velocity flow while keeping intake port volume on the small side. This'll keep the engine feeling peppy and you won't have to rev the **** out of it to make good power.
Yes, the cam can be changed without pulling the engine.
I'm not a fan of big injectors for a 350 size engine. 30/36s are too big to my way of thinking.
Just my thoughts.
Jake
