Speed plate for dual 38's on PHP manifold

GRiN · Sunday at 1:35 PM

I'm not sure if this exists, but id really like to run my billet PHP manifold and vf3 reeds, but local buddies are telling me not to run dual oem 44's on an unported 701 and to stick with dual 38's...

Is anyone running dual 38s on an aftermarket manifold
Or
Dual 44s w a/m manifold on a unported 701 with bolt ons (msd/Jetinetics/bpipe/ada head)

Thanks!

fastgtfairlane · Sunday at 2:30 PM

I ran 44s on an unported 701 and it ran great. It doesn't make any sense to run oem 38s on that manifold that is designed for 46s and up carbs. Why wouldn't you run the oem 38 manifold instead?

GRiN · Sunday at 5:36 PM

fastgtfairlane said:
I ran 44s on an unported 701 and it ran great. It doesn't make any sense to run oem 38s on that manifold that is designed for 46s and up carbs. Why wouldn't you run the oem 38 manifold instead?

The billet manifold is pretty lol

Basically because Ive already spent the money on the manifold and vf3 reeds assuming id build a bigger motor...i decided to run a 62T i had on the shelf while I debate if i actually need more motor.

fastgtfairlane · Sunday at 10:51 PM

If I were you I'd just get some 46s abd run those in your 62t engine. Do it once. The 46s will work fine on even a stock cylinder with a little tuning. They'll also work well up to 1000ccs for a freeride engine. For freestyle you'll want more carb.

Big Kahuna · Monday at 9:13 AM

fastgtfairlane said:
If I were you I'd just get some 46s abd run those in your 62t engine. Do it once. The 46s will work fine on even a stock cylinder with a little tuning. They'll also work well up to 1000ccs for a freeride engine. For freestyle you'll want more carb.

Blackjack 44's work well also up to 850cc!!!!!!!!

GRiN · Monday at 9:26 AM

So, should I not bother with the OEM 44's on the PHP/VF3 setup? I still have a stock intake and 38's I can run... I'd prefer not to spend $1000 on blackjacks or dual 46's right now, and I also need to assemble the complete ski this coming weekend to have it ready for Pismo on the 23rd...

eastbay · Monday at 11:45 AM

dude run the 38's and save the php/vf3 for big motor. If you had to purchase something than id say do it one the right way but if you got some good 38's ready to go then run them!

JetManiac · Monday at 12:03 PM

GRiN said:
I'm not sure if this exists, but id really like to run my billet PHP manifold and vf3 reeds, but local buddies are telling me not to run dual oem 44's on an unported 701 and to stick with dual 38's...

Is anyone running dual 38s on an aftermarket manifold
Or
Dual 44s w a/m manifold on a unported 701 with bolt ons (msd/Jetinetics/bpipe/ada head)

Thanks!

Either run the dual 38 setup complete or run the dual 46/php setup.
Both will work fine on a stock 701 if jetted and setup.
No frankenstein nonsense, will end in tears.

GRiN · Monday at 12:03 PM

38's seems to be the consensus among the people I will actually ride with who will then have every right to roast me if I don't listen and end up struggling with tuning the 44's lol

I already have all the correct b-pipe jetting for the 38's anyway.

Big Kahuna · Monday at 1:23 PM

Yeah, Stay away from OEM 44's!!!!!!!!!!! 38's if you are on a crunch.

waxhead · Monday at 8:42 PM

GRiN said:
38's seems to be the consensus among the people I will actually ride with who will then have every right to roast me if I don't listen and end up struggling with tuning the 44's lol

I already have all the correct b-pipe jetting for the 38's anyway.

38s are awesome compared to bigger carbs that are tuned badly

waxhead · Monday at 8:43 PM

Big Kahuna said:
Yeah, Stay away from OEM 44's!!!!!!!!!!! 38's if you are on a crunch.

Going to disagree with you on you with this one BK, they are not as good as 46s but they can rip if set up right

Big Kahuna · Monday at 9:16 PM

waxhead said:
Going to disagree with you on you with this one BK, they are not as good as 46s but they can rip if set up right

I started to post "Here comes Wax to disagree in 3.2.1...." LOL. The right person can get them set up good, not always the case for the average guy!!!! not just plug and play.

waxhead · 2025-10-14T00:57:20-0400

Big Kahuna said:
I started to post "Here comes Wax to disagree in 3.2.1...." LOL. The right person can get them set up good, not always the case for the average guy!!!! not just plug and play.

I’m that predictable, huh. These are another thing that copped a bad name — same story as what I said in the electrical post. The 760 carbs are actually easy to set up, but of course, you can’t sell new carbs if people just use these. They’re not as good as a 46, I get that, but they’re also nowhere near as expensive either.

And let’s be real — it makes more sense to have people buy what you’re selling than to show them how to make what they already have work. That’s half the reason these things got talked down in the first place.

Big Kahuna · 2025-10-14T09:00:52-0400

I got no dawg in the selling carbs game!!!!!!!!!! I personally like my 44 Blackjacks, They work great on my DASA 820! These the only new Carbs I have ever bought! Well, Bought a Single 44 once when I went to the single conversion once.............

GRiN · 2025-10-14T09:06:59-0400

waxhead said:
I’m that predictable, huh. These are another thing that copped a bad name — same story as what I said in the electrical post. The 760 carbs are actually easy to set up, but of course, you can’t sell new carbs if people just use these. They’re not as good as a 46, I get that, but they’re also nowhere near as expensive either.

And let’s be real — it makes more sense to have people buy what you’re selling than to show them how to make what they already have work. That’s half the reason these things got talked down in the first place.

I actually referenced a thread from 2006 where you and JR. were advocating for OEM 44's when I was having this discussion with my buddies. I bought your oem airbox to F/A adapter and noticed the little blurb on the site also mentions running 44's to wake the motor up...I assumed more people were running them! What manifold setup did you run with them, oem 64x?

waxhead · 2025-10-14T17:24:24-0400

GRiN said:
I actually referenced a thread from 2006 where you and JR. were advocating for OEM 44's when I was having this discussion with my buddies. I bought your oem airbox to F/A adapter and noticed the little blurb on the site also mentions running 44's to wake the motor up...I assumed more people were running them! What manifold setup did you run with them, oem 64x?

Yes for the oem carbs jsut run the 64x manifold

waxhead · 2025-10-14T17:25:05-0400

Big Kahuna said:
I got no dawg in the selling carbs game!!!!!!!!!! I personally like my 44 Blackjacks, They work great on my DASA 820! These the only new Carbs I have ever bought! Well, Bought a Single 44 once when I went to the single conversion once.............

Ha ha. I wasnt referencing you

fastgtfairlane · 2025-10-14T19:56:22-0400

I ran some oem 44s on my stock 62t before I had it ported and bored over. The key with the stock 760 manifold is filling the crossover. This really helps with tuning especially on the low end. The other thing with the oem carbs is the low speed adjusters. The thread pitch is very fine compared to the aftermarket 44s/46s. They ran fine for me. Im running a 64x manifold with the crossover tube filled and I think boyesen reeds.

Roseand · 2025-10-14T20:03:23-0400

I ran oem 44s on a 5mil stroker with epoxied crossover and vf3s and it worked absolutely amazingly.

Speed plate for dual 38's on PHP manifold

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