LS2 402 - Need top end advice

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Sep 14, 2011 | 02:17 AM

mowpow

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Joined: Mar 2009

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From: Mansfield Texas

LS2 402 - Need top end advice

I have a 98 C5 automatic and I recently acquired a TSP built LS2 402 with Wiesco +5cc's. The cam that was included in the sale is a Comp 242/248 (.610/.615), 112 lobe.

Coming off my LS1 are the following:
FAST 102 Intake
NW 92 TB
TSP 102mm MAF
Stock injectors
Stock fuel pump
Stock gears
LG LT headers

I want to keep the car street-capable w/ a decent idle. I little rough idle I don't mind, just don't want to lose power steering/brakes, have frequent stalling, etc. I plan to go nitrous once I get a rebuilt transmission. I don't expect the transmission to last long with the new motor but a couple thousand miles would be nice

.

Here are my questions:

1) Is the 242/248, 112 cam too big for this setup and my driveability preferences? If so, thoughts on a more suitable cam are welcome!
2) Should I upgrade my fuel pump and injectors since they are stock?
3) Looking at the TFS 235cc heads, any objections there?
4) What springs, rods and rollers should I get? Engine came with upgraded individualized rocker arms from TSP.

Thank you for any help you all can provide!

Jake

Sep 14, 2011 | 01:41 PM

tlove32

Melting Slicks

Joined: Aug 2008

Posts: 3,451

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From: Bay Area CA

Quote:

Originally Posted by mowpow

Here are my questions:

1) Is the 242/248, 112 cam too big for this setup and my driveability preferences? If so, thoughts on a more suitable cam are welcome!
2) Should I upgrade my fuel pump and injectors since they are stock?
3) Looking at the TFS 235cc heads, any objections there?
4) What springs, rods and rollers should I get? Engine came with upgraded individualized rocker arms from TSP.

Thank you for any help you all can provide!

Jake

1 - That's a pretty big cam but if tuned right, you shouldn't have any issues with stalling.

2 - definitely upgrade the fuel pump (racetronics 255lph pump) and injectors (Ford 42lb injectors)

3 - 2 thumbs up for the TFS 235's... If you get heads from TEA, inform them of your cam specs and they'll install the proper springs

4) TEA will also sell you the proper pushrods and rocker arms (harland sharp)

Sep 14, 2011 | 03:02 PM

mowpow

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From: Mansfield Texas

Thanks for the reply. Should I go with a smaller cam? I'm not opposed to selling this one and buying a new one.

Sep 14, 2011 | 06:29 PM

Z06ufgrad2002

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Posts: 4,394

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From: Melbourne FL

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Last edited by Z06ufgrad2002; Sep 14, 2011 at 06:30 PM. Reason: double post

Sep 14, 2011 | 06:30 PM

Z06ufgrad2002

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Joined: Nov 2002

Posts: 4,394

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From: Melbourne FL

That's fairly aggressive cam but should be streetable. The 112 would cause me the most concern as it should introduce a very noticeable lope. The rest of the cam specs should be just fine in a 402. I'm running similar spec cam in my 346 and it was my DD for 7 years.

Sep 14, 2011 | 08:23 PM

WKMCD

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Joined: Dec 2004

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From: Haymarket VA

With a good tune and a 2800 (or so) converter you should be fine. In a 346 that would be like a 232-238 cam - for comparison. The stoker cubes will eat a more cam.

Sep 16, 2011 | 10:59 AM

waddisme

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Joined: May 2007

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From: Taylorsville North Carolina

Seeing you are not committed to cam yet, I would call someone like Tony Mamo or exp builder, tell him what you want to do with car and then let them get your heads and cam matched up. Pretty sure you would have upgrade fuel system to get all you want out of the build. I went with 42# inj and LPE fuel pumps. Make sure to post some numbers when you are done

Sep 17, 2011 | 09:58 AM

mowpow

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Instructor

Joined: Mar 2009

Posts: 114

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From: Mansfield Texas

Cool. Seth at Hinson is helping me out. Here's what we have so far:

Trickflow 235cc, 70cc heads
Yella Terra Ultralite Rockers 1.7
Kenne Bell boost a pump
ati 10% underdrive super damper
Lunati/morel lifters
Ported oil pump

Going to pick up a TC at @2800

Already have a transmission cooler but I have a feeling that I'll be sending off my transmission for a build shortly after a couple runs hehe.

Thanks for all the help. Since I'm tearing the engine down and building it back up I'll take photos along the way and keep you guys updated. I'm sure I'll have questions as I'm an electronics dude and a n00b at engine building/rebuilding. Appreciate you all's help!

Jake