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Twin gt35 5.3, couple questions regarding the ar

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Twin gt35 5.3, couple questions regarding the ar

Old 06-04-2018, 10:36 AM
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Originally Posted by Forcefed86 View Post
Elevation plays a roll, but In general anything over 100kpa is ďboostĒ. Mine will make about 3lbs before pushing through the drum brakes. Similar timing and AFR. But my 10 PTC converter flashes to about 3200ish if I stomp on it. Sounds like youíve got a super tight converter. Prob not going to see boost at that RPM level.
super tight for sure, itís the factory converter. Biggest problem Iím having is my back brakes arenít doing squat. They wonít even stop the tires from turning on jack stands. I tried full on and full off with the adj prop, no difference. Should have the trans done and in tonight, will know more then.

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Old 06-04-2018, 11:00 AM
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Yea thatíll be stinker to get into boost I bet. Wonder how different the housings are physically. If my .63ís would fit we could swap. I wouldnít mind a less violent setup!

Might be another great application for a 50 shot for .3 seconds or so off the line to get them spooled. Cheaper and easier than any other option... bottle would last forever.
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Old 06-04-2018, 12:47 PM
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I put in a D1 brake when I did the rebuild yesterday, Iím better they light pretty easy now lol.

sorry for the thread jack OP :/
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Old 06-05-2018, 09:46 PM
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Originally Posted by Cwarta View Post
I put in a D1 brake when I did the rebuild yesterday, Iím better they light pretty easy now lol.

sorry for the thread jack OP :/
Lol itís all good. Taking this info in for my build. Never know what kind of issues Iíll run into, could be something similar.
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Old 06-06-2018, 08:37 AM
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Well since I haven’t bought any parts yet, let’s talk about this real quick. What do y’all think about twin s366 turbos? Stock out of the box cast 66/73 .91ar t4. Would be a little overkill but should work ok on a 5.3 I'd think, seen people use them with success. That’d still give me room to grow in the future to a 6.0? I’d scatter this 5.3 block long before I maxed out some s366s I’d imagine lol.

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Old 06-06-2018, 11:24 AM
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Twin 366s could indeed work well on both.
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Old 06-06-2018, 05:53 PM
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Originally Posted by 1CAMWNDR View Post
Twin 366s could indeed work well on both.
Think they would be terribly laggy on a 5.3? I know the right converter is key. I donít need them to spool instantly or anything but I donít want boost to take forever either.
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Old 06-11-2018, 11:26 PM
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New tranny works perfect! Put about 20 miles on it today, then tried the brake out. With the stock cam and stock 2500hd stall, I can reach 2600rpm in 3 seconds, and 110.4kpa. Thatís with 16* of timing, and a 12.02 afr, so there is room to improve in the timing to see if I can get more boost out of it. Just a little info for you on the turbos

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Old 06-12-2018, 08:53 AM
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Good to hear you got it going! You can get really aggressive in the low boost portion of the map. I’d try 30* and see how it acts to get it lit. Can run NA timing 140-150kpa or so.
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Old 06-12-2018, 08:59 AM
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Originally Posted by Forcefed86 View Post
Good to hear you got it going! You can get really aggressive in the low boost portion of the map. Iíd try 30* and see how it acts to get it lit. Can run NA timing 140-150kpa or so.
thanks! Last night I put 29* in it, I was considering trying the Iat mod but I feel like I donít have enough rpm for that
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Old 06-12-2018, 09:17 AM
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Did it do any better @ 30? Could also go the other way and see how it does... I run -17* on my 2 step to get it going. Usually once you get it lit, rpm will rise with boost. Getting past that initial hump is the tough part. Might be impossible on that converter without something like nitrous.

Have you looked into the trans coolant circuit bypass stuff? I don’t have any experience with it, but I think the idea is you hook up a solenoid and bypass the fluid going to your cooler back into the pan during the launch only. This gives you more slip off the line. Not 100% sure how it works. Sounds like it starves the converter for fluid temporarily so it slips more.
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Old 06-12-2018, 09:29 AM
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Not sure yet, I just did the tune, havenít tested anything yet. Iím going to try it like this, and then try it with the iat mod , see what those two things do. If that doesnít work Iíll look at that option as well!
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Old 06-12-2018, 09:44 AM
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5056 turbos in .63 A/R T3 made 600 wheel on a 4.8 with a 216/220 114 LSA cam at 17 lbs on the heart breaker dyno.

Its now a 5.3 with a 222/222 113 LSA cam and those same turbos. I imagine its putting out closer to 700 wheel.
The .82 A/R T3 would be my pick for a street driven 5.3. The larger housings will make more power but you get into some strange territory with a large A/R T3.
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Old 06-12-2018, 10:21 AM
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Could I talk you two into stopping by my t/a build thread and talking with me about my setup, I have some questions about my camshaft and I feel bad for muddying up Opís Thread.
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Old 06-13-2018, 02:54 PM
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Little video of the gt35ís
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Old 06-14-2018, 12:31 AM
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Originally Posted by JoeNova View Post
5056 turbos in .63 A/R T3 made 600 wheel on a 4.8 with a 216/220 114 LSA cam at 17 lbs on the heart breaker dyno.

Its now a 5.3 with a 222/222 113 LSA cam and those same turbos. I imagine its putting out closer to 700 wheel.
The .82 A/R T3 would be my pick for a street driven 5.3. The larger housings will make more power but you get into some strange territory with a large A/R T3.
Good to hear, I just want to make sure I'm going to make the power to push my car in the 9s, or faster. Can you explain what you mean by strange territory with the 1.06 ar t3? Like tuning issues or strange boost curves? This is my first turbo build so any opportunity for me to learn is nice.

Originally Posted by Cwarta View Post
Could I talk you two into stopping by my t/a build thread and talking with me about my setup, I have some questions about my camshaft and I feel bad for muddying up Opís Thread.
I don't mind you talking about your stuff in my thread, it's all opportunity for me to learn. But I'm subscribed to your thread, so I can always read up on stuff in there too.

Originally Posted by Cwarta View Post
Little video of the gt35ís
https://youtu.be/BsMbAsd1BUo
Glad to see you've got it running! Looks like it's going to be pretty mean! How much boost were you able to build on the line?
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Old 06-14-2018, 12:36 AM
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I can get to 2# and thatís it, I think if I had a good stall Iíd be golden, I just need a little more rpm. Or maybe a cam haha. She rolls out pretty good for what it is, Iíd say 11.5ís right now? Itís on 8#
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Old 06-14-2018, 12:41 AM
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Very nice! Glad to see it made a hit on the street. What overall boost do you plan to run eventually? You probably said it somewhere, but what size is your hotside pipe? And your gt35's are t3 or t4?
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Old 06-14-2018, 01:07 AM
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These are t3 .82 and I have 3Ē down pipes, Iím going to try my damndest to run a 10ísecond quarter on stock cam and stall, I think that would be pretty damn impressive. I plan on putting it up to 15# at the track and try and accomplish that. My last car was a [email protected] 1/8 car and I swear this thing pulls as hard or harder in its current form, before I turn it up. I have a cash days even the 23rd and then Iím going to the track the following weekend
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Old 06-14-2018, 01:11 AM
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Dude it was literally the 3rd post in the thread where you said they were .82 a/r lol , I just found it now that you posted this. Thanks though, I think I might just go with the .82 a/r myself.
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