ls 4.8 twin turbo build

[87buickracer]

Nice build! Looking forward to see the finished product!

Thanks....

 

[87buickracer]

Installing the 4l80e transco hd2 shift kit and dual feeding direct drum

 

[87buickracer]

Any good suggestions on converter choice for the 4l80e in 10 inch ?

 

[Chuck Leeper]

Call Dusty....he has some ideas on that topic.

 

[87buickracer]

Call Dusty....he has some ideas on that topic.

ok thanks

 

[87buickracer]

4l80e dual feed modifications with transgo hd-2 kit

 

[87buickracer]

picked up a nice overdrive planet set

 

[87buickracer]

checking out the exhaust..will probably even out the driver side to match the passenger...
Thinking of having both turbos exhaust housings face passenger fender to run both exhaust
pipes to passenger side 2 into 1 for my single exhaust

 

[87buickracer]

4l80e build---
4th gear ,overrun drum and planet in with input shaft

 

[87buickracer]

Picked up a nice used ls1 tci flex plate

 

[87buickracer]

Tci flex plate with arp bolts installed
Also installed starter
Looks like I may have to take off starter to install converter bolts..
Tight clearance between flex plate and engine

 

[Quick6'n'-K.C.]

Very nice write up man, im subscribing to the thread. Have a friend doing a NA 4.8 in a 84 monte ss its HER car so no turbos for her HAHAHAH

Why the z06 cam and not the lq4 cam, i hear they are close in comparison.

3 thumbs up!

 

[87buickracer]

Very nice write up man, im subscribing to the thread. Have a friend doing a NA 4.8 in a 84 monte ss its HER car so no turbos for her HAHAHAH

Why the z06 cam and not the lq4 cam, i hear they are close in comparison.

3 thumbs up!

The zo6 cam was free with ls1 parts ..
This stuff was so cheap I couldn't believe it..
4.8 engine(long block) $250
ls1 heads,crank ,comp push rods,oil pump,zo6 cam + springs,timing chain $250
2008 rods + pistons $75
2008 4.8 crank $75
5.3 short block (spare) $75.00
4l80e (core) $50
th400 (core) $50

 

[Quick6'n'-K.C.]

Are the 08 rods and Pistons better than the older stuff? I hear you will break rods before rod bolts
That's why I ask. Somewhere around 740 rear wheel on pump gas and 12 degrees of timing

 

[87buickracer]

Are the 08 rods and Pistons better than the older stuff? I hear you will break rods before rod bolts
That's why I ask. Somewhere around 740 rear wheel on pump gas and 12 degrees of timing

Yes ..the 2005 and up rods are stronger that's why i switched them...

 

[Chuck Leeper]

4l80e (core) $50

SCORE!!^^^

 

[87buickracer]

waste gates and blow off valve

 

[87buickracer]

modifying 4l80 pump

 

[MCH86GN]

Great build thread. Can't wait to see the finished product.

 

[MCH86GN]

Just doing a little research on 4.8L and found one that had 161k miles on it and it was cleaned up and most of the original parts were used with twin turbos. The goal was to try and see at what power level the with 76mm turbos the 4.8L would fail. Well they went all the to 1200hp and the 4.8L still was there. Article - http://onthedyno.com/GM-LS-motor/article/big-bang-theory-pt1-4-8l/