I finally bought a car - time to start working on it
- Thread starter barrrf
- Start date
Picked up an Iron Head LQ4 and 4L80E to build up for it.
Not really an update to the car.............kinda lame. Waiting on the machine shop to give it back so I can build it.
Plan for that is-
- 243s shaved to 61cc and ported - ARP head bolts
- Reuse polished crank and piston assemblies - factory cap bolts
- OEM MLS gaskets
- Reuse rockers with Straub Trunion upgrade
- LS7 lifters
- BTR pushrods
- BTR spec'd cam
- truck intake
- 8.1 injectors
- Melling erl pump
- LS2 timing chain
The idear is to run it like this for a year and use the funds from 396/4 speed sale to boost it.
Final CR should be 10.7:1. I'll tune it. Going to run a 4L80E with transgoHD2 kit. Maybe someday paddles.
Not really an update to the car.............kinda lame. Waiting on the machine shop to give it back so I can build it.
Plan for that is-
- 243s shaved to 61cc and ported - ARP head bolts
- Reuse polished crank and piston assemblies - factory cap bolts
- OEM MLS gaskets
- Reuse rockers with Straub Trunion upgrade
- LS7 lifters
- BTR pushrods
- BTR spec'd cam
- truck intake
- 8.1 injectors
- Melling erl pump
- LS2 timing chain
The idear is to run it like this for a year and use the funds from 396/4 speed sale to boost it.
Final CR should be 10.7:1. I'll tune it. Going to run a 4L80E with transgoHD2 kit. Maybe someday paddles.
Any ideas on what cam specs you're looking at?
And lemme get dat 396/4 speed. Would go great in my dad's truck.
And lemme get dat 396/4 speed. Would go great in my dad's truck.
Just submitted the online form for BTR to spec out a cam. Once I get feedback on it, I'll post. Not looking for anything overly aggressive.
Just got off the phone with the machine shop..............looks like we're doing a 370in build 
epper: 
kay: epper:
epper: kay: epper:
Thing is gonna be wicked. That's a lot of compression for boost tho, what are your plans for that?
Sent from my VS990 using Tapatalk
Sent from my VS990 using Tapatalk
The plan was to run it for a year or a few thousand miles to get it broken in. Then swap the shaved 243s for unshaved to drop the CR back to 9.5ish.
So now that I have to build a 370 Im faced with limited options.
- I cannot reuse stock pistons. Lets go shopping............
- I find the only direct piston replacements available for a 6.098 rod in .030 over are hypereutectic. Keith Black Silv-o-lites are about the best - review and metallurgical. I can get away with a couple hundred bucks and still use the stock rods.
- The other option is delay the completion of the build by a few months and bite the bullet and get h-beams and forged pistons. (Disclaimer: its not the money per se.........Ive got that. But I hate confrontation and my wife isnt excited about this engine project).
I would hold off a little while and get the forged stuff. DNW tear motor apart when it goes boom if it could be avoided for just a little more money
Sent from my VS990 using Tapatalk
Sent from my VS990 using Tapatalk
Well, its really 5x more money. Looking at $200 vs $1000............I was going to reuse the stock junk anyways. And that was based off of the enormous amounts of people building junk yard boosted motors and surviving.
Its more the thought of being able to run forged stuff that makes me want to do it.
But realistically 1000 is cheap insurance. The way I look at it, the stock stuff is gonna fail eventually and then you'll have to tear into it again to install the forged stuff, plus fix the damage. This way you only do it once and you can turn up the boost a little more when you're ready
Sent from my VS990 using Tapatalk
Sent from my VS990 using Tapatalk
Well, I couldve not taken anything apart and just installed in the MM and it maybe wouldve run for awhile and I wouldnt have known anything was wrong. But, I cant leave ANYTHING alone, so when I removed the heads I saw some rust on a couple of the pistons and thought "hey, lets take the whole thing apart"............and now here I am.
With that being said - Im going to run Scat 4340 forged I-Beam rods with ARP bolts (6.125" length, .927 Floating Pin) $340 and probably DSS Racing Forged 4030 Pistons ($480) with Mahle Piston Rings. Probably. IDK.