does anyone run this combo - 243 heads with TR230/224/111
 

I have a 2002 Z28 6-speed with about 38k on it. All I have done to it is 4.11 rear, Kooks 1-3/4 long tubes, magnaflow cats B&B triflow cat back, SLP Lid & MAF, z06 clutch and UMI Torque arm, LCA's and frame rail connectors.

On a mobile dyno and I was able to produce 344hp and 351ft/lbs at the rear wheels in good air with a mail order tune on stock heads and cam.

I saw a brand new set of 243 heads on a vette forum with the light weight valves and yellow springs for only $500 so I picked them up. I plan ti use them as is, no modifications. I just bought the TR230/224/111 cam and hardened pushrods.

I plan on purchasing the install kit (gaskets and such) leaving the stock balancer, TBI and injectors. After the install I want to have it properly tuned.

I have done a little research and found that it will be ok to use the yellow springs with this cam and that I will not have to upgrade injectors or headders.

I am wondering if anyone else has used this exact head cam combo and what results have you had, drivability, idle, emissions, HP gains and such. Or do you have any advise as to other parts I may wnat to consider.

Thanks in advance.

My cam is based off that one but I don't have heads or a good dyno result...but I read about others with that cam often.

With your bolt on numbers and the general gains I see I would expect that cam and heads to put you around 415-425rwhp with your set up and a good tune.

One guy on here even made 400rwhp cam only with an automatic with that cam

i would not use the ls6 springs with that cam

x2

He will need better springs. Thunder Racing recommends comp 918 or something similar.

I suppose I could by springs, I didnt see anywhere on Thunder Racings website where they reccomended a spring upgrade for that cam. The yellow springs are for a LS6 cam with .550 lift, the TR230 only had .575 lift.

Yellow springs are rated for about .570 lift max. Used springs at more than maximum capacity sounds like a time bomb. http://images.ibsrv.net/ibsrv/res/sr...2/buttkick.gif

They are not used springs.

There is no reason to not upgrade springs. If you are going to be going h/c why would you spend all that money and leave a weak spot like springs? Especially if you're gonna be so close to there max lift. +1 for possible ticking time bomb. But then again, it could run perfect. If it was me, I would make sure to uprade the springs!

I see, I will look into springs. Thanks for all the advice.

EDIT

I looked into 918 springs, they are only $190, If i buy these, can I reuse the stock keepers and retainers or do I have to buy them too?

as everybody said you don't want to run ls6 springs with that cam. lift is only one factor. ramp rates are also a big deal when picking a spring to match a cam. 918's work with stock seats and retainers(plug and play). if your looking for a nice spring look at the PAC 1218's or for a little more cash the 1518's

search for VIPRETR2. he is running the tr230 with 243's. he has been 10.80's i believe

Well i suppose I could order the 918's for $190 and reuse the stock retainers and keepers to try and stay within budget. Thanks fellas.

I'm using the PAC 1218's instead of the Comp 918. I've been very happy with mine and was able to pick them up at Speed Inc. for around $140. Should be a really nice combo you are putting together though.

X2 on the 1218's.....

some good info guys answered the question i was looking for as well!

I finally got the heads and cam in, car hauls ass above 3000RPM's

He is a driving MOFO though lol. Also had a 12 bolt.

Some people were asking me my gains from the TR230 and 243 heads

60hp and 15ft/lbs at the rears from a cam upgrade. I switched from the stock 241 head to a brand new set of Z06 243 heads when I did the cam.

The car had a different mail order tune for both before cam and after cam. I believ both dyno charts to be "corrected"



2002 Z28 6-Speed with approx 33,000miles in 2008
Kooks 1-3/4" Catted Y-pipe, B&B triflow cat back
SLP MAF
SLP LID
180 Thermostat
Mail order tune
Everything else stock
http://i181.photobucket.com/albums/x...uns_Page_1.jpg





2002 Z28 6-Speed with approx 41,000 miles on 2010
Kooks 1-3/4" Catted Y-pipe, B&B triflow cat back
SLP MAF
SLP LID
180 Thermostat
Mail order tune
TR230 CAM
243 Z06 Heads
http://i181.photobucket.com/albums/x...uns_Page_2.jpg

Please buy injectors. You will be easily maxing out your stockers.

yep, get bigger injectors!