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Old Nov 20, 2019 | 06:07 PM
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Default Turbo bottom end

Have a junk 5.3 wondering what the best budget rotating assembly is to support 1000hp big dream super small budget so want good stuff but on a Roman noodle budget tuning a 80mm turbo and new to it so sorry for the stupid questions in advance thanks
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Old Nov 20, 2019 | 06:54 PM
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Summit rods/pistons are about the best bang for the buck.
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Old Nov 20, 2019 | 08:34 PM
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I was going to make same post over the winter. I have the gen 3 rods so mine as well doing something forged.
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Old Nov 20, 2019 | 10:22 PM
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tel me more about these Roman Noodles
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Old Nov 21, 2019 | 09:05 AM
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Ramen Noodle diet budget. We like it. Everyone has a different budget point where they find themselves on a Ramen Noodle diet. We do have our own Summit Pro LS line of rotating assemblies and components. These are competitively priced and will handle your hp goal. The 5.3 based rotating assemblies with dished pistons can be found at this link.

Depending on the level of "junk" the 5.3 is and your budget, boring to a 5.7 bore would be beneficial for your goals. The "no replacement for displacement" theory. The Summit Pro LS 5.7 rotating assemblies with dished pistons can be found at this link.
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Old Nov 21, 2019 | 09:26 AM
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Originally Posted by Summitracing
Ramen Noodle diet budget. We like it. Everyone has a different budget point where they find themselves on a Ramen Noodle diet. We do have our own Summit Pro LS line of rotating assemblies and components. These are competitively priced and will handle your hp goal. The 5.3 based rotating assemblies with dished pistons can be found at this link.

Depending on the level of "junk" the 5.3 is and your budget, boring to a 5.7 bore would be beneficial for your goals. The "no replacement for displacement" theory. The Summit Pro LS 5.7 rotating assemblies with dished pistons can be found at this link.
I always wonder why people suggest boring a 5.3 when the whole beauty of the 5.3 is its thick cylinder walls and head gasket sealing surface. You can make more then enough power to lift the heads on the stock bore, the turbo is the replacement for displacement!
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Old Nov 21, 2019 | 11:06 AM
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Originally Posted by SLOW SEDAN
I always wonder why people suggest boring a 5.3 when the whole beauty of the 5.3 is its thick cylinder walls and head gasket sealing surface. You can make more then enough power to lift the heads on the stock bore, the turbo is the replacement for displacement!
This is a good point and dependent on the application. You are correct that boost can overcome the gasket easily. The extra displacement can help with spool and allow a bigger turbo to be run. One of the engines we're helping Matt Happel of Sloppy mechanic's build is an Aluminum LC9 with a 4" stroker that will end up at 360 cubes WITH the added cylinder thickness to boot. Another $699 for a crank, but the extra cubes will help with with spool, turbo sizing, and make it a little easier to develop a boost strategy to launch the car. We'd like to hear your input on this because you've obviously done quite well with your V in this regard.
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Old Nov 21, 2019 | 11:14 AM
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Originally Posted by SLOW SEDAN
I always wonder why people suggest boring a 5.3 when the whole beauty of the 5.3 is its thick cylinder walls and head gasket sealing surface. You can make more then enough power to lift the heads on the stock bore, the turbo is the replacement for displacement!
Most people who also claim to run a 5.3 for the wall thickness then put LS9 gaskets on them and lose most of the sealing surface area.

When it comes time to bore the 5.3, you have 3 options.
1. Buy another 5.3
2. Buy a 6.0.
3. Coffee table.
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Old Nov 21, 2019 | 12:00 PM
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Originally Posted by JoeNova
Most people who also claim to run a 5.3 for the wall thickness then put LS9 gaskets on them and lose most of the sealing surface area.

When it comes time to bore the 5.3, you have 3 options.
1. Buy another 5.3
2. Buy a 6.0.
3. Coffee table.
I'd buy the 6.0, as well as make a 5.3 coffee table.
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Old Nov 21, 2019 | 12:06 PM
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Originally Posted by Summitracing
This is a good point and dependent on the application. You are correct that boost can overcome the gasket easily. The extra displacement can help with spool and allow a bigger turbo to be run. One of the engines we're helping Matt Happel of Sloppy mechanic's build is an Aluminum LC9 with a 4" stroker that will end up at 360 cubes WITH the added cylinder thickness to boot. Another $699 for a crank, but the extra cubes will help with with spool, turbo sizing, and make it a little easier to develop a boost strategy to launch the car. We'd like to hear your input on this because you've obviously done quite well with your V in this regard.
I think most spool problems can be addressed in the tune unless its just an oddball combo. You can max out the turbines of a lot of the mid frame turbos with only 325ci. Boost/timing strategy is certainly fun, even with a little 5.3L and bigger turbos we find that we typically have to pull power out of them to get it to launch well. I've run a 5.3L with twin 69/73's as well as a single 88/96 and neither had a problem with spool, in all reality it was too fast to get off the line well without taking power out.

I don't own the V, I just help with ideas and fingerbang the keyboard on it while my friend drives the **** out of it. Summit Stage 4 cam was one of the ideas and it seems to work well. Engine in that car is a simple build, but has one of the largest S400 turbos on it and we have to knock first gear down a couple hundred hp to get it to stay on track. We basically have everything fighting us on that car, heavy weight, manual trans, crappy IRS, limited V1 parts availability, but we are still getting it done!

I've had an 8 sec 5.3L turbo G8 in the past and recently swapped a 5.3L into a C6 because I got sick of heavy cars. I'm using your cam and springs in the C6 without any complaints so far, spools up quicker then most people expect and that suspension seems to work a lot better then the family car stuff, not exactly shocking being 1000lbs lighter. I have another spare engine on the stand so I've been eyeing your new parts all around. I like what you are bringing to market so far!



Originally Posted by JoeNova
Most people who also claim to run a 5.3 for the wall thickness then put LS9 gaskets on them and lose most of the sealing surface area.

When it comes time to bore the 5.3, you have 3 options.
1. Buy another 5.3
2. Buy a 6.0.
3. Coffee table.
True, mainly because the LS9 gaskets are cheap and work well lasting multiple seasons. I've tried the 5.3 MLS gaskets and they blew out in 2 passes.
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Old Nov 21, 2019 | 12:21 PM
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Excellent points. We have some fun winter projects going together that we think you guys will like.
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Old Nov 22, 2019 | 03:49 AM
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Thanks summit for the links . I may be building a 1000 hp monster next winter
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Old Nov 22, 2019 | 07:49 AM
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Originally Posted by freeky
Thanks summit for the links . I may be building a 1000 hp monster next winter
No problem. 1,000 hp monster sounds like fun. When the time comes to build that monster let the community know, and we will be sure to help.
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Old Nov 22, 2019 | 03:46 PM
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Originally Posted by Summitracing
No problem. 1,000 hp monster sounds like fun. When the time comes to build that monster let the community know, and we will be sure to help.
do you guys have any dyno results ? Any quantitative data vs stock stuff ?

​​​​​​​thanks
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Old Nov 25, 2019 | 01:51 PM
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Originally Posted by 68roadrunner
do you guys have any dyno results ? Any quantitative data vs stock stuff ?

thanks
Hello, we don't have dyno tests for you at this time. We have the parts in the hands of Matt Happel (Denmah), Mavn, and Richard Holdener, but no results quite yet. We also have a project going internally, but it will also be a couple months. We will be sharing results as soon as we can.
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Old Nov 25, 2019 | 02:04 PM
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Originally Posted by Summitracing
Hello, we don't have dyno tests for you at this time. We have the parts in the hands of Matt Happel (Denmah), Mavn, and Richard Holdener, but no results quite yet. We also have a project going internally, but it will also be a couple months. We will be sharing results as soon as we can.
I have some as well. I was surprised by the piston quality, they really are nice pieces for the $$$.
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Old Nov 25, 2019 | 02:23 PM
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Originally Posted by JoeNova
I have some as well. I was surprised by the piston quality, they really are nice pieces for the $$$.
for me I was thinking of sticking with 5.3 because it’s custom swap and made to fit to these turbos. Not sure if larger turbos would bolt up to my manifolds. Also no room for larger than 3” downpipes. A 6.0 block would for sure require bigger turbos I bet.

would you recommend these for 900whp range? Is the crank needed? Comes with setup for 2k I’m not complaining, just asking.
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Old Nov 25, 2019 | 02:53 PM
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Originally Posted by Z32_5.3
for me I was thinking of sticking with 5.3 because it’s custom swap and made to fit to these turbos. Not sure if larger turbos would bolt up to my manifolds. Also no room for larger than 3” downpipes. A 6.0 block would for sure require bigger turbos I bet.

would you recommend these for 900whp range? Is the crank needed? Comes with setup for 2k I’m not complaining, just asking.
I usually stick with the motto "Don't upgrade until its broken". The hypocrisy is... I've never broken stock stuff and here I am with Summit parts sitting in the box.
Then again, I'm at ~24 PSI at 7400 RPM on stock gen 3 stuff and I'm going for 29 PSI and 7600/7800 so its bound to break eventually. Ohio winters and a car with no body will stall me until probably March.


A 6.0 with gen 4 pistons/rods will do 900 wheel. Your GT35s are T4 so they will handle a 6.0 without things getting too weird.
If you can't run anything larger than 3" downpipes, you'll either need to run cutouts with full exhaust or open dumps if you want to keep the backpressure ratio happy.
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Old Nov 25, 2019 | 03:18 PM
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Originally Posted by Summitracing
Hello, we don't have dyno tests for you at this time. We have the parts in the hands of Matt Happel (Denmah), Mavn, and Richard Holdener, but no results quite yet. We also have a project going internally, but it will also be a couple months. We will be sharing results as soon as we can.
You forgot about me! I'm trying to have mine together before the year is over. Rotating assembly going to machine shop this week.
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Old Nov 25, 2019 | 03:26 PM
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Originally Posted by JoeNova
I usually stick with the motto "Don't upgrade until its broken". The hypocrisy is... I've never broken stock stuff and here I am with Summit parts sitting in the box.
Then again, I'm at ~24 PSI at 7400 RPM on stock gen 3 stuff and I'm going for 29 PSI and 7600/7800 so its bound to break eventually. Ohio winters and a car with no body will stall me until probably March.


A 6.0 with gen 4 pistons/rods will do 900 wheel. Your GT35s are T4 so they will handle a 6.0 without things getting too weird.
If you can't run anything larger than 3" downpipes, you'll either need to run cutouts with full exhaust or open dumps if you want to keep the backpressure ratio happy.
nice! I should do 5-600 with my setup before my tuner prob wants to run meth or some better fuel anyways. So my options will be run meth and turn boost up, see what these turbos can do while build something right away because limits of gen3 rods OR keep it on pump gas 5-600 range and have some fun for as long as it’ll last or I’m bored then build something cause limits of gen3 rods. I watched a video showing size difference , it’s quite a difference in thickness. Makes me more depressed knowing that was available and someone put gen3 anyways lol.

You think my current turbos could keep up to a 6.0 block? Or you were saying t4 housing should be ok for many options a 6.0 would require?

honestly at the end of next year if nissan trans, turbos, clutch, rods last next summer, I plan to go th400 with the 900whp range. At that point maybe I’ll just go exhaust out the fender. Open downpipe now is not to bad considering I don’t have interior at all in car yet. Also they go right to under dash area so they prob at its loudest point right now.

either way the goal is 100% to get above 700 and at that power, run auto trans. Use this next summer as learning curve with 3200lb car and 5-600hp/tq
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