This is my semi-sleeper, an '81 Chevy Malibu Sedan. I say semi because, compared to some of the absolute sleepers on here, it has wider wheels/tires, a nice rumble, and a bit of a whine from the engine undel decel.

That being said, when it's dark on a Saturday night a number of the local muscle has gone down in unexpected flames.



Notice above that the fuel cell has been undercoated a dull black.

It has stains on it and some intentionally misaligned body panels, faded primer and dirty wheels.




But inside it has a potent 383:





The 383 is based on a 4-bolt GM block and has ported Edelbrock E-Tec 200 heads, a Vortech V-2 T-trim and a 230/236@.050", 112LSA, .575"/.584" net lift solid roller. I built the motor, brackets and fabbed all the tubing myself.

The overflow tank above was temporary and has been replaced by a smaller, better-fitting one.

Here's an under-rear shot before the FuelSafe cell was undercoated. Also the rear BFG KD's have been replaced by MT ET Drag Radials (275/40/17) since I had traction issues :




I have done a lot of bracing at the suspension points and plan to put in a hidden cage/rollbar. I have this set up as Pro-touring and it handles and stops pretty well.

13"x1.25" Front brakes (before painting calipers with flat BBQ black - they were visible through the spinning wheels):



And the 12.5" rears after painting:



And a trunk shot:



Some supprting bits:




The last time I dynoed it she put down 632rwhp/571rwt on a Dynojet at 11.7# of boost. Since then I changed the blower air intake from tightly bent flexible tubing to large radius mandrel 4" tubing, and added some bracing for the blower mounts and tensioners. Right away the boost jumped to 12.9# at 6300rpm.

I am in the process of building a Dart Little M-based 421ci motor with a Vortech YSi, AFR 235cc Eliminator heads and a larger solid roller (250/256@.050", 115LSA, .700" net lift). The cam will be pushing a set of T&D shaft rockers with a 1.7 intake ratio and a 1.8 exhaust. The goal is 1000rwhp on E85. I'll post up some pictures tomorrow.

There are some amazing cars on this site. I also like the sleepers.

Jim

 

F$%king Awesome!!

 

First off that is a damn good example of a sleeper done right, damn what an amazing car. How many street races have you won with that beast?

It reminds me of a Cadillac Seville D' Elegance that a guy used to run, underneath its basically a Nova. And he had a nasty 572 in it and slicks under the splats so you could not see them.

 

Frekin awsome sleeper!!! I see you are going to upgrade to a YSi. I was about to say the V-2 is a little small for your setup.

 

Bingo!!! Awesome stuff!

 

Something evil this way comes!!!!!

 

this is awesome!

 

dude

i f*#$%g love it

 

followed this car for a long time now on TECH,....by far, one of the coolest cars in the entire world.


Makes me wanna cuss. Tight work Jim.

 

whoa, thats one sick sleeper...look out

 

Thanks!

Here's what I'm working on, slowly building the new 421ci:

Based on a Dart Little M block with the steel main caps. Shown here with the Howards Cams American-forged crank with a big block snout, doublekeyed:







Running Howards Cams forged billet rods with ARP L-19 capscrews and tool steel .180" wall piston pins:



Custom JE pistons that match the AFR 235cc chambers, ceramic on top, Tuffskirt on the sides:



The AFR fine-CNC chambers, 2.125" x 1.60" valves, Inconel on the exhaust:



Mr. Mamo designed in some unusual vanes in this intake port:



Mocked up with the T&D shaft rockers:



I modifed a set of Hamburger valve covers - added bungs (over the original baffles) for vacuum and a filler cap on each side. Then I glass beaded them. Ready to get anodized here, probably grey on the covers and black on the caps:



Here's my fully ported Motown single plane modifed for EFI. I needed to keep the stack height low enough to keep the stock, flat hood, so I cut up my nitrous plate (NOS Big Shot) and embedded the important bits in the manifold:



There's tape covering the spraybar here, but a decent closeup of the porting. I will epoxy the spraybar in place and do a final skim cut to clean it up, and any grinding needed to make it not protrude:



This is what I've been doing this weekend, using the Bo Laws Performance kit to modify the block for piston oil sprayers. It comes with 2 fixtures, one for cyl. 1-7 and one for cyl. 8. Here I'm doing cylinder 3. I have already drilled the hole then stuck the bit through to show the angle:




More to come. I'm starting to get pumped now that things are coming together!

Jim

 

Dude, well done man. Very skilled,...I can appreciate what your doing. The Bo Law performance tool is freakin awesome. Sweet idea!

That intake runner does look crazy,..i've seen a lot of cylinder heads,...I haven't seen that before. Very interesting, must be a velocity thing.

That thing is sick already.....it's gonna be narley. Gonna stick with the blower?

 

That is the Rip van Winkle of sleepers!! Very impressive. Love it.

 

thats why I only like to run cars that "look" modified...

 

Wow, I'd love to see the look on the others drivers face as you pull away from them!