Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here.

          
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Old 03-21-2025, 11:54 AM
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I was meaning to visit his website to check them out. I had no idea they would be so affordable. Curious, are you going to run them in a twin configuration or are they for 4 cylinder projects? If these are sized right for twins they are a great deal!

https://richardholdenerperformance.c...ournal-bearing
No, I have a twin turbo car with GT45's on it. I couldn't stop thinking about how fast it would spool being he said that the gt45 spool slow compared to these. My car now spools fast so this is going to be really interesting to see what these do.

These are cheap compared to the $2600.00 precision turbo on the 4 cylinder. They are more than the gt45s I bought though. I didn't buy from him because he's just getting into selling them and figured it would take longer for him to get them shipped. He even said on his podcast that he's not fully going yet with selling them ..

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Old 05-30-2025, 06:23 PM
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I just ordered 2 of those turbos .
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No, I have a twin turbo car with GT45's on it. I couldn't stop thinking about how fast it would spool being he said that the gt45 spool slow compared to these. My car now spools fast so this is going to be really interesting to see what these do.

These are cheap compared to the $2600.00 precision turbo on the 4 cylinder. They are more than the gt45s I bought though. I didn't buy from him because he's just getting into selling them and figured it would take longer for him to get them shipped. He even said on his podcast that he's not fully going yet with selling them ..
Have you had a chance to swap out the turbos? Any feedback?

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Old 05-31-2025, 05:54 AM
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Have you had a chance to swap out the turbos? Any feedback?
yes, I got them both on.

The spool time is cut at least in half.

The power seems the same on top, but it comes on sooner with less throttle which is exactly what I was going for. I'm 100% happy and glad that I did the change. So glad I saw Richard's video. I haven't turned it up yet, I'm expecting nothing less than more improvement.

How's yours coming alone?

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Old 06-11-2025, 01:01 PM
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yes, I got them both on.

The spool time is cut at least in half.

The power seems the same on top, but it comes on sooner with less throttle which is exactly what I was going for. I'm 100% happy and glad that I did the change. So glad I saw Richard's video. I haven't turned it up yet, I'm expecting nothing less than more improvement.

How's yours coming alone?
I wanted to wait for your feedback on those turbos before making my decision. I think they will be a great fit for my combo and easier to package. I'm going to look around to see if I can find a mirror set.

I'm hoping to dig into the hot side fabrication in the next few weeks (I coach youth sports and All Stars is taking up my free time at the moment). I have a set of the 2.5" log manifolds from Stainless Headers. I'm running power steering (Hydro-boost) and used a custom remote tank set-up to give adequate room for the driver side manifold (hopefully lol).

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1970 Trans Am

Spotts Built 484" IA2, Highports, EFI Northwind, E85
Holley Terminator X sequential EFI fabrication and suspension by
https://www.funkhouserracecars.com/
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Old 06-12-2025, 01:52 AM
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I wanted to wait for your feedback on those turbos before making my decision. I think they will be a great fit for my combo and easier to package. I'm going to look around to see if I can find a mirror set.

I'm hoping to dig into the hot side fabrication in the next few weeks (I coach youth sports and All Stars is taking up my free time at the moment). I have a set of the 2.5" log manifolds from Stainless Headers. I'm running power steering (Hydro-boost) and used a custom remote tank set-up to give adequate room for the driver side manifold (hopefully lol).
Oh, ok cool, Yeah, the 2.5 will work very well. LMK how you make out. I look forward in seeing what you come up with.

Check put these turbos...

https://www.ebay.com/itm/13501091034...9ef6d69000d5a2

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Old 06-12-2025, 12:40 PM
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Oh, ok cool, Yeah, the 2.5 will work very well. LMK how you make out. I look forward in seeing what you come up with.

Check put these turbos...

https://www.ebay.com/itm/13501091034...9ef6d69000d5a2
I really appreciate the recommendation! That痴 a great price for twin ball bearing turbos. I知 99.9% sure I知 going with those. I知 going to reach out and see if they offer them in a V-Band instead of a T4 without the cost doubling.

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1970 Trans Am

Spotts Built 484" IA2, Highports, EFI Northwind, E85
Holley Terminator X sequential EFI fabrication and suspension by
https://www.funkhouserracecars.com/
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Old 06-12-2025, 02:39 PM
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I really appreciate the recommendation! That痴 a great price for twin ball bearing turbos. I知 99.9% sure I知 going with those. I知 going to reach out and see if they offer them in a V-Band instead of a T4 without the cost doubling.
No problem, just double check on what you're getting before you buy.

LMK how you make out ..

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Old 12-25-2025, 08:15 PM
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Yes, I got them on eBay . https://www.ebay.com/itm/265755232392 Hopefully this link works.

You should get the gt42 like Richard tested. He said it's good for 1200hp.

No ive never posted it here . Ill see if i can get some to load up here of my twin setup
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yes, I got them both on.

The spool time is cut at least in half.

The power seems the same on top, but it comes on sooner with less throttle which is exactly what I was going for. I'm 100% happy and glad that I did the change. So glad I saw Richard's video. I haven't turned it up yet, I'm expecting nothing less than more improvement.

How's yours coming alone?
How are the turbos holding up? Any results yet?

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1970 Trans Am

Spotts Built 484" IA2, Highports, EFI Northwind, E85
Holley Terminator X sequential EFI fabrication and suspension by
https://www.funkhouserracecars.com/
  #9  
Old 12-26-2025, 04:21 AM
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How are the turbos holding up? Any results yet?
Zero issues, there holding up great. If I can figure out how to upload a video, I'll show you how fast they spool on the trans break at 5psi ...

How about you, any progress?

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Old 12-26-2025, 12:42 PM
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Zero issues, there holding up great. If I can figure out how to upload a video, I'll show you how fast they spool on the trans break at 5psi ...

How about you, any progress?
That's great news! I've been busy with home projects and coaching, but I plan on jumping back into the turbo stuff again in the new year. I tend to overthink things I have a new lower profile intake elbow on the way from Wilson's that will help with hood clearance. I want to run a factory steel hood instead of my fiberglass unit. With the way I want to package the system I think the GTX3584RS's will be my best bet. I want to retain my full 3" dual exhaust.

Wilson's elbow https://www.wilsonmanifolds.com/coll...acing-95-105mm

I've decided on the dual v-band 0.83AR units. They will make fabrication and fine tuning/tweaking the fitment easier. My plan is the package them similar to this with the downpipes running underneath/next to the crossmemeber tying in with my 3" exhaust

I'd really like to see the video if you could send it to me. Maybe via text or email?

https://www.ebay.com/itm/18650217493...Bk9SR8ictbjrZg
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Holley Terminator X sequential EFI fabrication and suspension by
https://www.funkhouserracecars.com/
  #11  
Old 12-26-2025, 08:10 PM
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That's great news! I've been busy with home projects and coaching, but I plan on jumping back into the turbo stuff again in the new year. I tend to overthink things I have a new lower profile intake elbow on the way from Wilson's that will help with hood clearance. I want to run a factory steel hood instead of my fiberglass unit. With the way I want to package the system I think the GTX3584RS's will be my best bet. I want to retain my full 3" dual exhaust.

Wilson's elbow https://www.wilsonmanifolds.com/coll...acing-95-105mm

I've decided on the dual v-band 0.83AR units. They will make fabrication and fine tuning/tweaking the fitment easier. My plan is the package them similar to this with the downpipes running underneath/next to the crossmemeber tying in with my 3" exhaust

I'd really like to see the video if you could send it to me. Maybe via text or email?

https://www.ebay.com/itm/18650217493...Bk9SR8ictbjrZg
Sounds good.

I thought that you already bought the turbos months ago..

Here's my cell number 631 294 9095 . if you still want it . Here's my email too if you want = [email protected]

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