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View Full Version : Rebuilding engine, need ideas


racinjason
02-27-2004, 06:29 PM
I have a 96 Mystic. My current 67k mi engine is burning more oil than the iraqi army! I was thinking about rebuilding it with H beam rods, forged pistons, and either a supercharger or for nitrous. Does anyone having any suggestions or ideas? I was also thinking about buying an 03 supercharger for it and some 03 heads from KarKraft. Any ideas? Thanks so much!!! -jason

tcrews
02-27-2004, 09:55 PM
There are many many options to do currently vs. when I had mine rebuilt. If you aren't looking for mega power just a simple rebuild with forged components and an .020 overbore to clean the cylinder walls will do. Most shops charge about $2900 using your block. This will make the engine strong enough to handle boost as long as you fuel it properly.

If you want mega power....I'd build a strong forged shortblock with the big-bore setup (302cu in.), keep the stock compression ratio and run 15-16 psi of boost through it. Add some boost specific cams and port the heads and the car will be a freaking monster :)

smashedheadcat
02-28-2004, 08:41 AM
Just by talking to True Blue Performance, If I was build a monster next time around...... I'd go with an iron block. I personally haven't heard anything confirming that the aluminum block is the reason for failures, but they said the warranty work they do is mostly on aluminum engines. They have only had to rebuild 1 GT shortblock under warranty, and many cobra shortblocks (aluminum). They've built very high horsepower GT blocks that hold up longer then less powerful aluminum ones. With that said, if I was building a boost specific engine again, it'd be an 03 cobra block, turn the crankshaft at a machine shop .010, stuff it full of manley forged rods (same as 03 cobra), and your choice of pistons (I have manley in mine, same as 03 cobra). Go with billet oil gears (spend the money on them), port your stock heads, go with a set of blower specific cams, have the intake at least port matched to the heads, and go from there. Personally, I'd stay away from the big bore, just because of the cylinder wall thickness. It looks like it's begging for disaster if you ask me.....

Josh

tcrews
02-28-2004, 01:16 PM
Too many people out now with big bore blocks proving there is nothing wrong with them. Has to be the aluminum block though...can't big bore the iron blocks because of the water jackets and their location vs. the aluminum blocks.

Also I don't buy the iron vs. aluminum issue. All the mega power guys are still running aluminum blocks (1000 rwhp and above) even if they are race dedicated engines. If it's built right....it won't need warranty work, that goes for aluminum or iron blocks.

If you go with the iron block, add a couple extra hundred dollars to your rebuild price...not really a lot. Add about 70 lbs to your front-end as well though.

smashedheadcat
02-28-2004, 02:08 PM
I agree Tom, but I'm just telling what Chris at True Blue told me. They are seeing these things first hand, and passed it on to me. I know that most guys that make huge power have aluminum blocks, but nowadays, it's not uncommon to see 600rwhp through an iron block (03 cobras). I know that the block isn't the reason, but these cars are holding together better than I thought they would. I don't know if I'm paranoid or not, but I'm still scared to put any more than 12psi through my car. I'm still sitting pretty much the same as when you saw my car last. When it hits the road again, it will have the AFM powerpipe, new intank pump (switched from BBK to Warlboro), taylor wires and a working aftercooler water pump. When I toss the 3.33 pulley on it, it'll be getting a retune by Randy.

racinjason
02-28-2004, 02:12 PM
Thanks guys. I've been reading the magazines for years but have never been through this, personally. Also, I rely on the expertise of those who have been there as I don't know very many people, personally, who have built up mod motors. Thanks again, guys!

97BlackSnake
02-29-2004, 08:00 AM
What do you guys think about the following SHM engines:
SHM 4.6L Cobra Forged Shortblock
$3995
SHM 4.6L Cobra Billet Shortblock
$5395

redsnake99
02-29-2004, 09:01 AM
Jason, put a V6 in it and give the rest of us a chance. Thanks for the red light. That put me in the third round of brackets. But, I lost to the eventiual winner.

See ya in November, if not sooner.

:D

smashedheadcat
02-29-2004, 10:26 AM
Originally posted by 97BlackSnake
What do you guys think about the following SHM engines:
SHM 4.6L Cobra Forged Shortblock
$3995
SHM 4.6L Cobra Billet Shortblock
$5395

First engine............ personally, i'm not going through that again. My engine lost oil pressure shortly after the rebuild with all SHM stuff. A tear down showed no signs of anything done wrong by SHM, I was out $7000 for that engine. But, on a different note.... if they do absolutely all the work...... (remove, build, install, and tune) they have probably the best warranty out there........ Just be ready to pay big bucks.

Josh

tcrews
02-29-2004, 10:55 AM
I've heard of quite a few failures from SHM as well as quite a few success stories. I've heard of good and bad from just about every shop out there. SHM being one of the bigger ones just has more stories...

VT Engines, Houston Performance, Alternative Autos, Modular Performance, True Blue, Haywoods Speedshop....a ton of choices some being closer than others.

http://www.haywoodspeed.com/ (Randy Haywoods shop)
http://www.seanhylandmotorsports.com/ (SHM)
http://www.alternativeauto.com/ (Lidio's site)
http://www.vtengines.com/index.html (ex SHM employees)
http://www.mvperformance.com/Index.html (MV Performance)
http://www.modularperformance.com/ (Modular Performance)
http://www.houstonperformance.com/ (Houston Performance)
http://www.true-blueperformance.com/ (True Blue)

There are tons more........but that should get you started :)

racinjason
03-01-2004, 05:13 PM
Redsnake99,
I think you have the wrong jason. I think you are referring to Jason Roberts (N Augusta SC), the winner from the Fall 03 Drag Day. The last I heard from him, his Mystic was still running good. Sorry.

Mystic_Cobra
03-02-2004, 06:02 PM
Tom, I was under the impressions that there were still only a few (less than 5) good shops working on the DOHC. Clearly that's not true and that's good. If you know of other good shops that are, please provide more links. I love doing internet research.

boostedstang
03-13-2004, 02:39 PM
you could buy mine and not have to worry about it. It already has a fully built motor.