Mild, driveable cam for 402 but want over 520RWHP
03-03-2008, 03:15 AM
#81
11 Second Club
Thread Starter
iTrader: (8)
Join Date: Aug 2005
Location: Pasadena, CA
Posts: 2,451
Likes: 0
Received 0 Likes
on
0 Posts
and I made a new thread, since this thread has gotten congested..
https://ls1tech.com/forums/generation-iv-internal-engine/875061-want-reuse-my-heads.html
03-03-2008, 02:27 PM
#82
11 Second Club
Thread Starter
iTrader: (8)
Join Date: Aug 2005
Location: Pasadena, CA
Posts: 2,451
Likes: 0
Received 0 Likes
on
0 Posts
Here it is in a nutshell. When you use the Tv3 and the same heads in a 402, you will make virtually the same rwhp as before, but with 65-70 more rwtq. The airflow of your intake and heads, coupled with the valve events of your cam determine your hp potential. You will make around the same hp but at a lower rpm peak.
but it makes sense if I make it at a lower RPM peak..
03-03-2008, 09:26 PM
#83
TECH Resident
iTrader: (7)
Join Date: Feb 2008
Location: south point,OH
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
ive seen back to back dyno of a SB350 and then a 383 stroker using the exact same setup(heads,cam,intake,carb) and the tq sounds about right as it made about 60 ft lb more. tho it didnt make that much more HP it did increase about 40 average thruout the power curve. this was at the crank tho
03-03-2008, 10:24 PM
#84
11 Second Club
Thread Starter
iTrader: (8)
Join Date: Aug 2005
Location: Pasadena, CA
Posts: 2,451
Likes: 0
Received 0 Likes
on
0 Posts
ive seen back to back dyno of a SB350 and then a 383 stroker using the exact same setup(heads,cam,intake,carb) and the tq sounds about right as it made about 60 ft lb more. tho it didnt make that much more HP it did increase about 40 average thruout the power curve. this was at the crank tho
but I still will upgrade my injectors. what should I go with? and what spark plugs? thanks...
for a 402 - 427 cid run with he same heads and cam I have now...
03-05-2008, 01:37 PM
#87
10 Second Club
iTrader: (7)
Join Date: Jun 2004
Location: Fayetteville, NC
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
My 402 build with soundclips/track times/specs here: https://ls1tech.com/forums/showthrea...284&highlight=
small cam, small heads great drivability
small cam, small heads great drivability
03-05-2008, 05:37 PM
#88
11 Second Club
Thread Starter
iTrader: (8)
Join Date: Aug 2005
Location: Pasadena, CA
Posts: 2,451
Likes: 0
Received 0 Likes
on
0 Posts
My 402 build with soundclips/track times/specs here: https://ls1tech.com/forums/showthrea...284&highlight=
small cam, small heads great drivability
small cam, small heads great drivability
03-07-2008, 10:31 AM
#89
11 Second Club
Thread Starter
iTrader: (8)
Join Date: Aug 2005
Location: Pasadena, CA
Posts: 2,451
Likes: 0
Received 0 Likes
on
0 Posts
Here is what you do. Trade in those heads for some AFRs, TFs, or ETPs. Get a Fast 90/90 and decent LTs. Keep the compression the same. This will allow you to do a milder cam, and still get the performance you want. Otherwise, you will have to go BIG cam and even then it's a shot in the dark getting to 520rwhp. There was a thread on here, and the average 402 was dynoing at just over 500 rwhp.
