boostd4

I'm trying to decide which way I want to go with my LS1. I'm planning a build to be dropped into a 94 RX7.

I'm trying to find a cam (or heads/cam package) that will not give me a lopey idle. I'd like it to be as smooth as possible. As much as I love a big lopey cam in an F-body, it just doesn't fit the RX7. I plan to experiment with the exhaust to get a nice tuned V8 sound instead of a tinny-lumpy-mean sound.

I may still do a single turbo setup down the road, and I'd rather not do heads and cam twice.

If my sticky reading helped any, it looks like I should be looking for a cam that has very little overlap, but high lift - BUT.. at a certain point my stock heads negate any higher lift (this is the point I don't know about), and I'd require better flowing heads.

Can someone help me out? I'd like the car to have good street manors with excellent idle and make 400whp. That should be good enough for 10's in a 2800lb RX7, and that's the goal. I'm tired of weezy 4 cyl's and rotaries.

Mart00SS

iTrader: (19)

If I were you I'd probably go with something like a TR224 on a 114 LSA. I think a few people are close to 400 whp with stock heads. The cam has good street manners and a close to stock idle.

This is straight off Thunder Racings web site
" 224/224 .563/.563 114 LSA 1700-6600 RPM Power Band. Excellent mid-range & high RPM power. Requires computer tuning on automatic transmission cars. Due to the fast ramp rate of this camshaft, the use of 1.8 rockers is not recommended."

I'm sure if you punch this cam in search you can read what a lot of people feel about it.

flintwrench69

iTrader: (11)

I just did a TSP 228 .588 lift, 114 LSA cam install on mine recently. It pulls much nicer than stock, & thats without a tune, scanned it & runnin lean. I gotta get the tune done on it Friday so I will really see how this cam will perform. It idles very good, with a slight lope. I almost wish I wouldve went just a lil bigger like a torquer 2 or a 230 232 cam with a .598-.600 lift. If your shooting for 400 whp, you wont want to go with anything smaller than a 224 cam unless you do heads.

beedo

iTrader: (28)

Just put in the cam Matt00SS mentioned and love it. Put it in last week in my stock stalled auto and it is doing really well, idle is good tuned and you can tell it has a cam in it. Before it was tuned the thing sounded HUGE! Go bigger though, 228 or somewhere around there will be good. I was scared of the 224 cam but now that I see how it drives and performs I wish I done it a long time ago.

Xtreme57

iTrader: (6)

ls6 heads/cam w/long tubes and an underdrive pulley.

boostd4

Not sure going bigger than that is an option. This car may very well be turbocharged in a year or two. I have a few requirements:

1) No lopey idle, or at least be able to be tuned out.

2) As little overlap as possible for a better turbo setup in the future

3) Smooth powerband. The car is already light and will only be running 275's out back. Any violent torque increases will only melt the tires as it will be driven daily.

I've searched a bunch on the TR224 114 cam and it seems like a good choice, though I haven't found anything regarding this cam and forced induction.

Any suggestions on heads, or is it unecessary for ~400whp? Remember, this will be on a 98-99 (most likely) LS1 with LS6 intake, LTH, no cats but fairly large resonator/mufflers.

flintwrench69

iTrader: (11)

It seems like what I have read, with that cam you will be a little under 400 whp cam only. I know someone that has that cam in his 03 Z06 & he put down 408 on a dynojet, but thats in an LS6 though. With good heads definitely 400 whp, that depends how much you wanna spend cuz real good heads are $2500 range. I heard 243 LS6 heads are a very huge value in flow & hp increase over stock. You can find a good used set for $500-600. Most likely a set of 243s will be my next mod.

conan

iTrader: (5)

Check out the "blower cam" http://www.thunderracing.com/catalog...&vid=3&pcid=51
As far as heads I would wait untill you go forced induction. You'll want a 72cc combustion chamber to loose some comression and that will not help your N/A goals.

TRANS-DAD

iTrader: (1)

216 216 .561 .561 114 That is SPEED INC.'s turbo grind & will work good N/A also

boostd4

^^ Is there a good set of matching heads for that turbo cam that would net me ~400whp N/A?

I might be N/A for a year or two before going turbo and since I'll be selling my other 11 second toy to build this one, I won't be happy with a car that sounds 10x meaner but is actually a second SLOWER

Jason 98 TA

iTrader: (4)

The TSP 220R & 224R will both be good choices. I installed a 220R on a 116+4 in my wife's 02 SS with great results. It ran good with the stock verter & idle was so clean I had to tell her I did a cam swap. As far as cylinder heads are concerned you can definately get to 400rwhp, but you'll want to run a head without any milling if your going to add boost down the road. The PRC LS6 heads would be a good choice, or we also have a PRC 241 cnc ported head that doesn't move as much air, but for $800 with springs they're pretty hard to beat!!!

Jason 98 TA

iTrader: (4)

Cam package:

http://www.texas-speed.com/shop/item...d=174&catid=49

220
http://www.texas-speed.com/shop/item...d=164&catid=44

224
http://www.texas-speed.com/shop/item...d=166&catid=44

Give us a call if you want dyno data from any of these combos, I have engine dyno before & after data that might help!