Joe Brodman

I've e-mailed a couple places, with no response. Figured I'd just ask on here:

- All forged 383, 4-bolt mains
- AFR 210's, heavily worked over by Advanced Induction, w/ ported LT4 intake
- Comp R lifters, 1.6 Comp Pro-Mags
- Twin Intercooled D1SC, 12-rib setup
- CR of around 8.3:1; this is to be a pump-gas motor
- Car is currently a pig at about 3650 without me in it
- 6-speed, but will hopefully go T-braked built TH400 this winter. 3.73 rear
- Like to spin it to 7k. Tuning will be done w/ LT1_Edit

Any suggestions? My previous setup was ported stock heads, stock shortblock, CC306 and spray. I liked the idle on that cam, and want something just as bumpy...it was also very streetable. So something along those lines as well. Lift in the lower .600's is also what I'm looking for.

engineermike

You won't like the recommendation, but an Extreme cam that's 224/230-112 will work great. That would be .605" lift on the intake with 1.6 rockers. This cam and cams similar to it have been proven to the upper 140's in the quarter using a D-1SC. Of course, most will disagree because they believe blower cams have to have at least a 10 deg split and have to have a 114 LSA, which are both total BS.

Mike

RealQuick

I would go as big or bigger to squeze out a little more power, but if the D1SC is truly "maxxed" the gains of a diferent cam might not make too much of a difference.

engineermike

Yea, kp is running around 145 mph in the quarter with a D1SC. He switched from a ZO6 cam (202/210 or so) to a cam around 228/232 and gained maybe 1-2 mph. He later switched to a much bigger cam (23x?) and gained maybe another 1-2 mph. Think he's around 148 now. These numbers may not be totally accurate, but the point is that the difference in power between cams wasn't as dramatic as you might think - probably because he's at the limit of the blower.

Mike

RealQuick

That was exctly my point too Mike (one post up). KP has indeed maxxed out that D1, so gains were minimal, but increasing the cam size helped a little. If the thread starter has "maxxed" out the D1 like he says, it probably isnt worth switching cams for the small gains.

T/A KID

IMO I think your CR is a little low for a maxed out D1SC, would be ok if you were sporting a bigger blower F1A or YSI since it would do 20lbs plus on your setup. Remember LtX cars are reverse cooled and they tend to be better against detonation.
(On a side note don't know why the LTX cars don't mop up the pump gas drags, lol.)

Thought about a FMIC, does wonders for the IAT's

Whats the plans for the car?? If you want to have a nice driver on the street, every thought of doing a 4L80E swap?

Its ok to spin the motor high becuase that is the norm, but I have learned with FI you don't have to spin it to the moon, just speed up the blower and you'll be fine.
I have my D1SC spinning to 60,571 RPM at 6200 rpm (using a 3.2 BP)
And call it a day and visit Ed Wright, there is many things that can be missed, unless tuning is your thing and or you know what your doing .

Mike I have a similiar cam going in my motor XE 224/230 on a 114

AGREED.

That has been my Hypothesis for about a year and half now and KP basically proved it, lol.

Yea Z06 cam to a XE 222/228 on a 115 in the .550 lift range, to the bigger 232/240 cam. Like you said he gained some MPH but he lost some low end TQ with the bigger cam shifting his power band upward.
So yea I AGREE with mike and realquick, if you have maxed the D1SC out just throw in a medium sized cam and enjoy the better driveability, lol.

BTW Joe your setup is Very Similiar to mine and I am hoping for 650-700RWHP , then we may hit it with a little nitrous, lol

streetbad

I understand KP may have been looking to drop some things beside ET. He was looking for that "panty dropping idle".

RealQuick

97WS6Pilot

Yea, that cam (224/230-112) has a great power band and is very driveable.

Joe Brodman

I currently don't have the pulley to max out the blower (have a much lower boost one to start off with, until I get it together/sorted out).

After the car is out of the garage, bugs sorted out, then I'll spend more money to upgrade my fuel system past what it already is, and buy whatever pulley will max it out at where ever I'll spin the motor to.

Car stays 6-speed right now only because I don't have the $$ to do a TH400 setup I want yet. Same reason I won't be doing the fuel system yet (just injectors and what I already have done previously).

This whole setup was built to max out a D1SC on pump gas. It is actually my roomate's setup he was going to run on his SS prior to him deciding to go a different route with the car.

My car will be a street/strip car. Trailered to the track, driven on the street on the weekends, but I'm willing to give up some driveability for performance. But I only want to buy a cam once........

Lisa33

Call Bret, he made oure last cam and its totaly backwords accourding to most people here, peaked 780rwhp at 6700-6800 on a max reved F1 (8.5 comp pump gas)
Also Skip the twin IC, they didnt do there job when we had a max reved P1SC, we tried a 4" OBX IC and that was a hugh different in IAT readings.
This year we ditch the FMIC and only run meth/water injection (also run 50/50 pumpgas/E85)
made a 8.85 and a best top speed att 152 mph last weekend on a 89degree day (no N2O yet)
Havent weight the new car yet so i cant realy say how much difference the cam and ditched IC made but it feel real good...

T/A KID

AWESOME, Congrats your like the third LT1 in the 8's of all time
guessing what do you think the car weighed before with the FMIC.
You don't have to tell me LSA but how big is that Duration??

Lisa33

The car weight 3641lbs last year when it made 9.44, this years car is a complete new one Im hoping alot under 3000lbs and we are aming for 8.5 this year. http://www.nonameracing.se/photos/de...ASCONA0714.jpg
Cam is 24x-26x LSA 10x

T/A KID

So the motor and Drivetrain setup is in that car or the F-body still???