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86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
LTX and LSXPutting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
I love this build it makes me want to give the turbo thing a try. Its looks like you have had your ups and your downs but your learning and teaching us.
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Holy good lordy that is a sweet build! You have come so far! This is an awesome build thread! I can't wait to see some track times with MT's and more boost! Are you going to use the trickflow cam later?
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Originally Posted by Mr.ChevyStroker
Holy good lordy that is a sweet build! You have come so far! This is an awesome build thread! I can't wait to see some track times with MT's and more boost! Are you going to use the trickflow cam later?
What is this trickflow cam that everyone speaks of. What are the specs?
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
"I also decided to pull the LS9 cam and put in something a little more moderate in specs. In went the super cheap Trick Flow 216/220 cam. It has a 114 LSA and .560x/.560x lift."
The majority of the time seemed to be the factory cam then he tried the ls9 ans wasn't to impressed.
The trick flow one gave him gopd numbers though!
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Hey yall!! wow thanks for the kind words! VERY FLATTERING!!!! I'm really happy that other folks are finding the thread useful! Seriously every time I read kind words it makes it all worth it even more.
This is the trick flow cam I used in the 4.8 which is $287 free shipping http://www.summitracing.com/parts/tfs-30602001
The car went 120mph on just 6 psi with it and at 11 psi ran 128 blowing the engine along the way. I give it 2 thumbs up.
Right now in the 5.3 I'm still running the stock cam which seems to be working pretty well. I still have the TF cam in the garage and might throw it back in later on. Soon as the track opens back up for winter I will run it with fresh rubber and hopefully be back with some good times.
Till then here is a sweet burnout I did today to hold yall over I goofed at first and threw it in neutral after I hit the 2step. LOL
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
man I like this build and it makes me wish I had went a ls motor.my procharged 385 with holley hp efi only went 2 tenths quicker than your 4.8 and I have a lot more than 4000 in it. makes me want to cry. when your piston broke what do you thick caused it? the reason I ask ive been running mine almost a full year and running it very hard and it has done awesome until last weak it started to knock.I pulled it down and my piston looks almost identical to yours only worse.it was a 750 dollar set of mahle forged pistons. any ideas?
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
I've read a lot of theorys on why the pistons go like that. Seems it's usually 1 of 3 things. 1) for whatever reason (too lean, too much timing) knock happens and fractures the piston or torches it. 2) running too rich washed the bores causing ring seal to fail resulting in the heat not disipating or whatever and torching through or the fuel burning in the lands. 3) rings too tight and they butt causing ringland to pop and torch that area.
It's all theory and we can't look inside the engine to see what is really going on. I'm sure others here with more knowledge can elaborate more.
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Last update. The car was sold a few months ago. The new owner put it on the dyno and it made 411 hp/496 tq on just 6psi!!!! It still runs very strong and is now back up for sale by new owner. Pm me if interested and I will get you in contact! Thank you all for the support over the years.
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Thanks yall!!! I miss the car but still feeling good about selling it.
It wasn't about the money. It's an awesome car but after 10 years and 20k+ I just wasn't having fun anymore. I wanted to dump another 6k into it for upgrades and it's hard to do that knowing how these cars just don't bring much money no matter how modded.
Anyway thanks again for yall's support over the years!
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Originally Posted by Kyle86
Thanks yall!!! I miss the car but still feeling good about selling it.
It wasn't about the money. It's an awesome car but after 10 years and 20k+ I just wasn't having fun anymore. I wanted to dump another 6k into it for upgrades and it's hard to do that knowing how these cars just don't bring much money no matter how modded.
Anyway thanks again for yall's support over the years!
I just spent an hour reading this thread on my phone and you sold it?! My heart broke I thought for sure you'd go 10.99
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
Sorry Jcash442!!! I came pretty close. I wish I had got the 10 sec slip too, but at the end of the day it's just a #. I had a hell of a lot more fun racing it heads up on the 1/8th than I did with white nuckles at the end of the 1/4. The car took the WHOLE shut down to stop too LOL That car went straight as an arrow though. With the $$$ I was able to buy an RV and start a new chapter in my life. I will own another hotrod one day and do it right. This car was an invaluable learning experience.
Re: 86 IROC - LS 4.8/5.3 on E85, Truck Accessories, Megasquirt 2, GT45 Turbo!
really? SDR has a 1/2 mile or more shut down....i could almost coast to a stop from 128mph there....as a matter of fact, it's the longest shutdown i've ever been at. i almost went off the end of the track at a couple of places up here cause i was spoiled by SDR's long shutdown, lol. there are a couple of tracks that my current 135 mph trap speeds make me really nervous at.
Re: 86 IROC-Out with 383 IN with LS 4.8, Truck Accessories, Megasquirt 2,GT45 TURBO,P
Originally Posted by Kyle86
Next obsticle was the truck waterpump hitting the throttle body. This was actually pretty easy. I just chipped the epoxy from around the waterneck and heated the ps pump casting around the neck with a little propane torch. then I took a mallet and tapped it to the side, simple. The throttle body cable part almost clears but I dinged the waterneck a tad with a ball pean hammer.
Next is the alternator moved to the ps side. For this I used washers, long bolts, and a turnbuckle, all cheap from tractor supply. I added a bolt to the turnbuckle so I could lock it down.
Now fuel system on a budget took some thought. What I ended up using was an 2000 s10 filter regulator wix part# 33100. Then I borrowed a doubleflaring tool and bubble-flared the quick-connect barbs for rubber efi fuel line and efi clamps so they wouldnt slip off. This included all 3 barbs on the filter/regulator and the ls1 fuel rail inlet. I osed no more than 12" sections so I could pass nhra tech. Oh yeah on the 33100 the inlet is 5/16 and return is 3/8. if you hook it up backwards you wont get fuel pressure.
Fuel pump is the jegs walbro 255 inline pump. I used my old carb filter as a prefilter with a piece of rubber hose around it. This way I can monitor to make sure fuel is getting to the pump. Basically I just spliced it into the factory fuel lines.
Tried to make as much room for turbo as possible so I cut the rad core support some. Looks like my fat old griffin is not going to cut it here, I will be using a stock one but it should work fine since the ls1 cooling system is so efficient.
Cool thread. Im doing the same swap minus the turbo. Do you think you have enough room on the balancer to do a setup like this in the pictures? Cool thread. Im doing the same swap minus the turbo. Do you think you have enough room on the balancer to do a setup like this in the pictures? The guy doing the same swap cut the tensioner wheel off the a/c bracket for clearance purposes.
Re: 86 IROC-Out with 383 IN with LS 4.8, Truck Accessories, Megasquirt 2,GT45 TURBO,P
Originally Posted by 86iroc504
Cool thread. Im doing the same swap minus the turbo. Do you think you have enough room on the balancer to do a setup like this in the pictures? Cool thread. Im doing the same swap minus the turbo. Do you think you have enough room on the balancer to do a setup like this in the pictures? The guy doing the same swap cut the tensioner wheel off the a/c bracket for clearance purposes.
1) You bumped a 6 year old thread, and the original poster has already sold the car.
2) You could have asked me, since that picture was taken from my build.
For the record, YES, you obviously have enough room on the balancer for the A/C compressor belt, that's why I posted above/ below pictures.
Re: 86 IROC-Out with 383 IN with LS 4.8, Truck Accessories, Megasquirt 2,GT45 TURBO,P
Originally Posted by dixiebandit69
1) You bumped a 6 year old thread, and the original poster has already sold the car.
2) You could have asked me, since that picture was taken from my build.
For the record, YES, you obviously have enough room on the balancer for the A/C compressor belt, that's why I posted above/ below pictures.
1) I didn't know it would be hassle to.bump a 6 year old thread
2) I think his alternator configuration is a little different from yours and I was gonna go with his and not buy any brackets, thats why I asked him. No big deal to me.
I just wanted to make absolute sure that there was sufficient room. Now I have my answer. Thanks for responding.
11-29-2014, 10:33 AM
I'm really happy that other folks are finding the thread useful! Seriously every time I read kind words it makes it all worth it even more.
I goofed at first and threw it in neutral after I hit the 2step. LOL
