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

          
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Old 03-21-2025, 03:08 PM
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R 70 Judge R 70 Judge is offline
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Yeah, I just looked at the link you sent. Mine will be here next week. His site says late April... Not that it's a big deal but it was 10 bucks cheaper where I got them ..
Can I ask where you got them? I’m looking for a larger single around 88mm and I’d like to see what they offer. I think a single would be easier to package for me. I’m only wanting to make between 900-1100 hp. To package twins I’d have to move some of my hydroboost and catch can lines. Not terribly hard but you run out of room quick when you are trying to cram an intercooler, cold and hot pipes in the engine bay.

Do you have any pictures of your twins setup? I don’t think I’ve ever seen any posted.

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1970 Trans Am

Spotts Built 484" IA2, Highports, EFI Northwind, E85
Holley Terminator X sequential EFI fabrication and suspension by
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Old 03-21-2025, 03:51 PM
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Can I ask where you got them? I’m looking for a larger single around 88mm and I’d like to see what they offer. I think a single would be easier to package for me. I’m only wanting to make between 900-1100 hp. To package twins I’d have to move some of my hydroboost and catch can lines. Not terribly hard but you run out of room quick when you are trying to cram an intercooler, cold and hot pipes in the engine bay.

Do you have any pictures of your twins setup? I don’t think I’ve ever seen any posted.
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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Old 03-24-2025, 08:01 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
Just watched the test between the 800+ HP GTX3584 and the 1200-HP G42-1200. I’m definitely looking into the G42. I do have concerns that the G42 may have too much back pressure with my combo though. It will probably end up in the 461” - 466” range. I’m current at a 4.285” bore but will be reducing the stroke from 4.21” to 4”. It ain’t no little 5.3 LS

https://youtu.be/FDij2zpr3jo?si=_Mx8XENCoqNdHuQK

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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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