[Mike@K-Tuned]

From what I understand the IPS and Hayward IM's perform pretty much the same because they were designed by the same person (Lance Hayward)

I have also seen several people using the Excessive and AFI manifolds with excellent results.

 

[Jas9848]

I am hoping that post wasn't a whp numbers game.

lol. I'm just saying it seems like all the cars tuned there have some ridiculous numbers...I think it has been talked about on here and some other forums.

From what I've seen, the AFI doesn't flow so great in all motor application, Excessive is still a little small for some motors and the Hayward Drag manifold with 90mm is the closest you're going to get to ITB's (60mm or larger).

 

[Joe McCarthy]

Mike,
All of the testing (6 different engines) was done on the same Dynapack, the one at Shawn Church's shop that Hondata owns. None of us had ever seen a bone stock K20A make that much HP before either, so don't feel like the Lone Ranger. That particular K20A (JDM Type R) had never been all that strong a motor. I've seen others like it make 245 HP on the same dyno, which indicates that a really sweet 245 HP engine would end up with pretty close to 290 HP with one of these intake manifolds. There are a LOT of things that are different in my design compared to other manifolds, but the biggest one is the fact that I've tuned the runner length to take full advantage of the 2nd order wave harmonic. That keeps the torque curve from falling off above 6,000 rpm the way it "normally" does with Honda manifolds. I put normally in quotes because there's nothing really normal about this at all, its simply a function of how Honda designs their intake manifolds, and in this case they screwed up by optimizing it for the rather weenie 3rd order harmonic. Ferrari does the same thing so its not just Honda we're talking about here. Its mostly a packaging and ease of casting consideration on their part. This certainly isn't new science. I've used it on other intakes I've built for over 20 years.

 

[signalpuke]

^buitrex:got pics of that? i find it hard to believe you can fit a 90mm TB on a rbc, unless you chop off the tb flange and box it out larger with sheet metal(custom plenum).

Interesting thread, how about the AFI & Hayward manifolds in comparison to the IPS and Xcessive ?

People have switched from AFI and Xcessive manifolds to IPS manifolds and picked up MPH. People have tested them, but I don't know if you will see any plots...one thing to consider though: AFI, Xcessive, and Hayward manifolds sit in the classifieds for weeks at a time without selling. IPS manifolds sell within a day most cases, and still go for retail pricing.

 

[signalpuke]

Joe, how much does your manifold weigh?

Would be nice to get the weights of all of these manifolds, and size comparisons. I will see if I can get the IPS and Hayward manifolds weighed in the next couple days.

Some pics for size comparison:

RBC - LHP - PRB

RBC - IPS

 

[Joe McCarthy]

Signalpuke,
14 lbs. cast in Aluminum. 8 1/2 lbs. cast in Magnesium
I'm glad you posted that picture of the RBC next to the Hayward/IPS manifold. That makes it easy to see how pushing the design toward a bigger plenum shortens even more the already too short runners. I reminds me of the B-series turbo manifolds everyone used to make, other than the central inlet T/B position which is always the best place for it.
My runners are MUCH longer than the RBC, hence the extra weight.

 

[LHP]

My manifolds are not light by any means,
typically .200"+ wall thickness.
More durable then say a sheet metal manifold in a boosted situation.

I can make a longer runner manifold if there is a need/want,
but engine compartment packaging does become an issue.

Anyone still wanting IPS manifolds??

LHP

 

[Accord]

funny i was wondering the same thing i have a rbc with 70mm tb and i have xcessive with q45 center feed . 12.5:1 cr k24 stock k20a2 head with skunk2 stage 3 cams im hoping i didnt waste money and the xcessive out performs the rbc as it should . later on ill build a big motor

 

[ek)-(atch]

Made 300+ on a stock non port matched rbc with 70mm tb. Pump gas

 

[firmk20]

opcorn:

 

[signalpuke]

My manifolds are not light by any means,
typically .200"+ wall thickness.
More durable then say a sheet metal manifold in a boosted situation.

I can make a longer runner manifold if there is a need/want,
but engine compartment packaging does become an issue.

Anyone still wanting IPS manifolds??

LHP
www.haywardperformance.com

Considering how quickly they sell in the classifieds, I would say that the answer is yes.

How much do the IPS manifolds weigh?

 

[adamlee05]

This is a good thread and all, but I'm wondering where the OP got TSX Type-S cams. Pretty rare since there's no such thing. Maybe he meant RSX? Just has me wondering

 

[Mike@K-Tuned]

funny i was wondering the same thing i have a rbc with 70mm tb and i have xcessive with q45 center feed . 12.5:1 cr k24 stock k20a2 head with skunk2 stage 3 cams im hoping i didnt waste money and the xcessive out performs the rbc as it should . later on ill build a big motor

I would surely expect the Xcessive w/ Q45 TB to outperform the RBC w/ 70mm TB. What power do you make now? Just curious...

Made 300+ on a stock non port matched rbc with 70mm tb. Pump gas

Very nice. :up: What was the rest of the setup?

 

[_Mozz_]

Im quite positive a "proper" ported RBC/RRC will be superior to the Xcessive up to 8000rpms....

Obviously im not talking about a k26/k27 drag build, but your average k24 with boltons and cams..

 

[K20EF8]

Im quite positive a "proper" ported RBC/RRC will be superior to the Xcessive up to 8000rpms....

Obviously im not talking about a k26/k27 drag build, but your average k24 with boltons and cams..

I wouldnt be so sure about that. I cant speak for the excessive but here is a 12.5:1 2464cc (89x99) motor heavily ported Endyn RBC with a plate in the plenum vs IPS manifold

With a bigger cam like a DC4 that gap might even widen...

 

[_Mozz_]

I wouldnt be so sure about that. I cant speak for the excessive but here is a 12.5:1 2464cc (89x99) motor heavily ported Endyn RBC with a plate in the plenum vs IPS manifold

With a bigger cam like a DC4 that gap might even widen...

I mentioned the Xcessive as they have a Side feed one. Thats the comparisson I was doing, as when you move to the IPS its not just the Manifold that changes from on test to the other, It will have a diferent intake, length and width and most likely a diferent Throttle body!


Here is a Ported RBC vs Xcessive:

K24 block 87.5mm bore x 99 stroke
Wiseco shelf 12.5:1 compression pistons
Brian Crower shelf rods
K20a2 head ASP Ported .5mm over intake valves/stock exhaust 318 cfm @ 28" h20
Brian Crower Valve Springs/Retainers
XXX Cams
RBC ASP Ported Manifold 400 cfm @ 28" / Xcessive
76mm B series throttle body
4-1 Custom ASP Header w/megaphone
3" exhaust

 

[pulpmelon_r]

Is the second dyno sheet a ported RBC vs the side or center thottle Xcessive Mozz??

 

[_Mozz_]

Is the second dyno sheet a ported RBC vs the side or center thottle Xcessive Mozz??

Side mate.

 

[studioface]

It seems that the ported RBC has a more healthier mid range and some torque though.

 

[dc5con]

Side mate.

i would like to see it with the throttle body in middle of Excessive k pro intake as they are meant to be way better so i here