Maggie advice needed...
, but would like to start autocrossing. Thanks
Keep the (easy on the valve train) stock cam and do the headers. I think I read someone else on here got 50 HP when they put headers on there maggie. You will gain more than a person with a stock n/a motor. But don't forget the tune after installing those headers. 




Hey BRO, how you been? Remember when you almost dealed for my old 427 C5R MONSTER!! You missed out on one HECK OF CAR there my friend and i do miss it dearly. I agree with the above post as not touching the internals of your motor and valvetrain will just lead to you having that much more of a reliable ride (and you will be able to smoke this bad boy in the first two gears no problem)!
GREAT SET UP you have going and with that plan set forth above i would think you would be a happy camper.
Last edited by Mopar Jimmy; Sep 15, 2005 at 01:50 AM.
I had 401 rwhp in my non-intercooled Maggie car and picked up 42 or so rwhp when I added 21st Century's blower cam (and springs), without a change at that time in pulley. Lots of this power was at the high rpm band. I would be very surprised if headers could match that on a Maggie car.
FYI -- I later went with a smaller pulley and alky and never did abandon my stock exhaust manifolds.
But, here's an old thread when I changed the cam (thread ), and here's the dyno graph that's also shown there:
Perhaps it's different for the intercooled car. You might try calling John Page @ 21st Century: link; phone number = 972.417.7177
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Thanks for all the advice. I was sold on the LG's, then SteveL2 comes in with a 42rwhp pick up with just a cam
. SteveL2 do you have the cam specs? How about heads? Are they worth the extra$ on a Maggie?
Thanks for all the advice. I was sold on the LG's, then SteveL2 comes in with a 42rwhp pick up with just a cam
. SteveL2 do you have the cam specs? How about heads? Are they worth the extra$ on a Maggie?On my car, I tried to go with most hp per $ as I added things. When I drove the poor car off the freeway, it still had the stock heads and the stock exhaust, except I changed to the C5 Z06 mufflers. That shows you that in my case, I felt these things to replace were the most money with the least gain. Of course, it also had a smaller pulley and alky, too.
Sorry, but I don't have the specs on the cam, other than the important one: 40+ rwhp.
Seriously, call John Page @ 21st Century. He's not going to hard sell you, or at least I hope he won't. He'll just go over what they've seen as results in their shop, and as an authorized Lingenfelter installer, they've done a bunch of Maggies.
I have a stock LS1 with intercooled maggie, I'll post here my
baseline with maggie and numbers after header install.
Thanks, Just what I've been looking for.
with Donaldson filter, Corsa cat back, auto tranny with 3.15 gears and
a I/C Magnuson. Dynotuning was done by same tuner on same Dynopack dyno. Before headers/cats 414.5 lb ft torque @ 3998 rpm,
after install 436.5 lb ft torque @ 3847 rpm. Before headers/cats
410.4 rwhp @ 6000 rpm, after install 421.9 rwhp @ 6000 rpm.
Boost dropped a little. The motor appears to be breathing much easier
and when driving it feels much stronger! This was also a conservitive tune. I cannot say which would be better, cam or LT's but am going to install a cam this winter. I think the two would complement each other
and work best as a package. Which ever way you go the grin factor
is well worth the money spent (in my opinion)!

I'm looking into the same thing, Torn between headers or cam. Probably will do both, but which 1st? Lingenfelter said if I go with their GT2-3 cam, no tuning is required. Anyone run this and how much HP?
Heres the specs:
LPE LS1 Camshaft 207/220 .571/.578 w 1.7 rocker 118.5 CL
I'm at 430rwhp I/C, would like to break 450
after install 436.5 lb ft torque @ 3847 rpm. Before headers/cats
410.4 rwhp @ 6000 rpm, after install 421.9 rwhp @ 6000 rpm.
Boost dropped a little.
What was your boost before and after the header install ?
It would be interesting to get your boost back up to where it
was originally and dyno again.
Thanks >>>>> INTHERED
if any gear change should be. Right now I am running 295x19
Yokohamas and under 35 mph I have no traction, I don't drag
race so that isn't an issue. What I want from a gear ratio is
maxium acceleration from 50 mph to 150 mph for playing with
exotics. I will have to do more research on that
!In my opinion if you are going to drag race go ahead with the T/C
but I think you'll need an output shaft and drag radials because otherwise traction will be a joke
. On the street the car isjust what I wanted and is too much fun, I just want to get to 150
a little faster. I would think the car as is would satisfy 99.5% of
anybody driving on the street.
What was your boost before and after the header install ?
It would be interesting to get your boost back up to where it
was originally and dyno again.
Thanks >>>>> INTHERED
notice what is was before the header/cat change. I will find out
what was involved with the tune and get back to you.


















