Comp 918's enough spring for my FI setup?

Reply Subscribe

Thread Tools

Search this Thread

Oct 28, 2010 | 02:14 PM

mattster03

Thread Starter

10 Second Club

iTrader: (22)

Joined: Sep 2005

Posts: 309

Likes: 0

From: Bellingham, WA

Comp 918's enough spring for my FI setup?

Hey guys, I wanted to bounce this tech question off you as I'm piecing together my procharged setup. Here's what I'll be running:

Stock bottom end 346 LS1
P1 or D1 Supercharger @ 8 psi
317 heads, 9.5:1 CR
Futral F7 Cam (224/230 +114LSA 0.585/0.595)

I currently am running a TR224 +112 which I am running Comp 918 springs (rated at 0.600" lift) and TSP hardened push rods. I would really like to transfer the springs from my 241 heads to my new 317 heads. My question is, will these springs be enough for me? I plan on revving to 6,400 RPM. thanks!

Oct 28, 2010 | 04:55 PM

2001WS6Vert

10 Second Club

Joined: Apr 2002

Posts: 1,755

Likes: 2

From: Cincinnati, Ohio

I had them when I ran a T-trim at 11lbs and 6400 RPMs or so and they performed fine. I run Patriot golds now.

Oct 28, 2010 | 04:57 PM

mattster03

Thread Starter

10 Second Club

iTrader: (22)

Joined: Sep 2005

Posts: 309

Likes: 0

From: Bellingham, WA

What was your cam lift?

Oct 28, 2010 | 05:04 PM

westtexasbuff

Banned

iTrader: (40)

Joined: Dec 2006

Posts: 1,012

Likes: 3

From: Austin, Tx

How many miles are on them? I would personally get some Patriot golds just to be safe. I had some 918s fail on me, and I run a 232/234 .595/.598 cam. Your cam seems around that max lift area... Sell those and get some Golds.

Oct 28, 2010 | 05:06 PM

mattster03

Thread Starter

10 Second Club

iTrader: (22)

Joined: Sep 2005

Posts: 309

Likes: 0

From: Bellingham, WA

Are you boosted? If so how much psi? Mine only have about 5K on them....

Oct 28, 2010 | 05:14 PM

Josh@PremierAutosports

Banned

iTrader: (11)

Joined: Aug 2004

Posts: 541

Likes: 0

From: Memphis

You would probably get by using unless they have alot of miles on them. With the boost behind them I would have to suggest going to a nicer dual spring setup. I would never build a customers car for boost with them but if you are on a very very tight budget use them but keep new springs on the top of your list.

Oct 28, 2010 | 05:14 PM

mattster03

Thread Starter

10 Second Club

iTrader: (22)

Joined: Sep 2005

Posts: 309

Likes: 0

From: Bellingham, WA

Thanks for the info. I am not on a super tight budget with my build, but it does feel nice to be able to re-use a few parts! I suppose I might be able to sell my CC918's...

Last edited by mattster03; Oct 28, 2010 at 05:20 PM.