Evo 8.9 RMC 2.2 FP red
Jan 5, 2023 | 02:39 AM
#16
Thanks 
.... ( ? ) lol
The longest rod that should be used with the 94mm in the 4g64 block is a 159mm. Longer rod, and the compression distance gets too short (it's around 1.011"), the pin is almos into the 2nd compression ring (goes above the oil ring set), and weird things happen.
We've revved the the 94mm to 9500 with 150mm rods in the 4g63 standard deck blocks. Haven't seen any issues that would be related to piston speed, or lack of rod ratio. So on 4g63 motors, we only bother with custom 153mm rods if we're doing aluminum rods. Because the 153mm Carrillos get pricey.
People obsess over rod ratios in the 4g, and I think they forget, or just don't know, that most Honda engines happily rev where ever the head decides to stop flowing with rod ratios less than 1.6:1.
Example: the B18. 89mm stroke, 137mm rod. 1.54 rod ratio. Dudes yank those things out junkyard Integras and rev them 9k with a rod/piston build.
94/150 for a 4g is a 1.595 rod ratio for comparison.
.... ( ? ) lolThe longest rod that should be used with the 94mm in the 4g64 block is a 159mm. Longer rod, and the compression distance gets too short (it's around 1.011"), the pin is almos into the 2nd compression ring (goes above the oil ring set), and weird things happen.
We've revved the the 94mm to 9500 with 150mm rods in the 4g63 standard deck blocks. Haven't seen any issues that would be related to piston speed, or lack of rod ratio. So on 4g63 motors, we only bother with custom 153mm rods if we're doing aluminum rods. Because the 153mm Carrillos get pricey.
People obsess over rod ratios in the 4g, and I think they forget, or just don't know, that most Honda engines happily rev where ever the head decides to stop flowing with rod ratios less than 1.6:1.
Example: the B18. 89mm stroke, 137mm rod. 1.54 rod ratio. Dudes yank those things out junkyard Integras and rev them 9k with a rod/piston build.
94/150 for a 4g is a 1.595 rod ratio for comparison.
Jan 5, 2023 | 06:46 AM
#17
Evolving Member
Joined: Jun 2014
Posts: 140
Likes: 18
From: Lancashire, UK
I don’t know if any body listens to the Hidden Horsepower podcast by Total Seal but pretty much every guest that goes on says the same things in this topic when building an engine. Pick your capacity first, design your piston second then use the rod length that fits third.
Jan 5, 2023 | 12:21 PM
#18
That was the info I was looking for when I had to rebuild my 2.4. I asked the shop how is it that Honda's can rev to the moon on a 2.4 but yet a Mitsu can't and they really didn't give me an answer. They said basically we have tried all the combo's for the 4g and this is what has had the best results so I went with it. Good info thank you.
I don’t know if any body listens to the Hidden Horsepower podcast by Total Seal but pretty much every guest that goes on says the same things in this topic when building an engine. Pick your capacity first, design your piston second then use the rod length that fits third.
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alpinaturbo (Jan 20, 2023)
Jan 11, 2023 | 11:44 AM
#21
If I were to ever move from the stock frame stuff I'll likely be an Artec mani with a Xona turbo. Every year I bug BW about making reverse rotation EFRs. Or if Garrett would do aluminum center cartridges...
The G30-770 seems like a logical step up from an MHI red. For track use I don't think you'll see much loss in transient response as long as the engine isn't being bogged.
The G30-770 seems like a logical step up from an MHI red. For track use I don't think you'll see much loss in transient response as long as the engine isn't being bogged.
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dr_latino999 (Mar 31, 2023)
Mar 27, 2023 | 10:13 AM
#25
G’day Sean,
I’ve always liked your build particularly because it’s using the FP Red & producing the power/torque it makes. It has brilliant torque & it producers it so early in the rpm range on your stroker. It’s a pity your Red has finally let go, what caused the Red to fail?
The FP Red is at the top of my stock framed turbo list, if I decided to move up from the stock IX turbo, maybe the UHF version.
I’m very glad you hung around on the forum (so many left) as you always give advice to forum members. The forum is lucky to have you.
I’ve always liked your build particularly because it’s using the FP Red & producing the power/torque it makes. It has brilliant torque & it producers it so early in the rpm range on your stroker. It’s a pity your Red has finally let go, what caused the Red to fail?
The FP Red is at the top of my stock framed turbo list, if I decided to move up from the stock IX turbo, maybe the UHF version.
I’m very glad you hung around on the forum (so many left) as you always give advice to forum members. The forum is lucky to have you.
Last edited by Steveevo9; Feb 22, 2024 at 07:35 AM.
Mar 27, 2023 | 07:55 PM
#26
Originally Posted by Steveevo9
G’day Sean,
I’ve always liked your build particularly using the FP Red & producing the power/torque it makes. It has such brilliant torque & it producers it so early in the rpm range on your stroker. It’s a pity your Red has finally let go, what caused the Red to fail?
The FP Red is at the top of my stock framed turbo list, if I decided to move up from the stock IX turbo, maybe the UHF version.
I’m very glad you hung around on the forum (so many left) as you always give advice to forum members. The forum is lucky to have you.
I’ve always liked your build particularly using the FP Red & producing the power/torque it makes. It has such brilliant torque & it producers it so early in the rpm range on your stroker. It’s a pity your Red has finally let go, what caused the Red to fail?
The FP Red is at the top of my stock framed turbo list, if I decided to move up from the stock IX turbo, maybe the UHF version.
I’m very glad you hung around on the forum (so many left) as you always give advice to forum members. The forum is lucky to have you.
Thanks for the kind words
Mar 31, 2023 | 07:29 PM
#27
Thanks .... ( ? ) lol
The longest rod that should be used with the 94mm in the 4g64 block is a 159mm. Longer rod, and the compression distance gets too short (it's around 1.011"), the pin is almos into the 2nd compression ring (goes above the oil ring set), and weird things happen.
.... ( ? ) lolThe longest rod that should be used with the 94mm in the 4g64 block is a 159mm. Longer rod, and the compression distance gets too short (it's around 1.011"), the pin is almos into the 2nd compression ring (goes above the oil ring set), and weird things happen.
Apr 4, 2023 | 12:24 PM
#30
Newbie
Joined: Dec 2018
Posts: 63
Likes: 11
From: Oregon
The red finally gave up probably because to get the curve you see was a maxed turbo. It would not make more boost. About 38-39psi on the hit, falling off to 27 out the top. Ran it like that on the street for probably 8-10k miles. Shaft speeds unknown, but I'm sure it was well beyond what Robert would have approved lol
Thanks for the kind words
Thanks for the kind words