Racer X Intake manifold design, development, and results

[new2subaru]

Originally Posted by Dr. BRZ

I will say this peeps. I am on e85 and i do have the greddy snorkel. All I'm missing to be the Guinea pig is the intake manifold and bigger throttle body lol

Do it!

[Dr. BRZ]

Originally Posted by new2subaru

Do it!

Gotta wait for their dyno first man!!

[Trueweltall]

Originally Posted by PulsarBeeerz

Yet to see a dyno run or tune that wasnt...You tune for the entire useable range, not just till the power drops.

Did you skip the post of the dyno graph?

[Hawk77FT]

the temptation is there!

[Dr. BRZ]

It's the right price! Under $1000!!!

[finch1750]

Originally Posted by Jeff@Racer X Fab

That is the plan, first we will do the full exhaust system then finally an E85 tune.

I have a feeling this is what everyone will be waiting for. I could see a great market for these for the NA track guys once every other power mod is done (headers and high octane). Also would love for it to be optioned in something a bit more inconspicuous like a wrinkle black if possible.

[Dr. BRZ]

I am so hoping this pushes the 200whp limit to 220 to 230whp. That would be perfect for the twins. Especially with weight reduction, this will make a world of difference.

[PulsarBeeerz]

Originally Posted by Dr. BRZ

I am so hoping this pushes the 200whp limit to 220 to 230whp. That would be perfect for the twins. Especially with weight reduction, this will make a world of difference.

200whp+ on 93 would be amazing. But, IDk I have reservations on how well it will perform on E85. Though the runners are larger and not hurting VE on pump gas, will the added length hurt VE and top end performance at higher rpms where the knock resistance of E85 becomes advantageous?



That said when I had a full exhaust and the Crawford BPBs that this forum is divided on the power band was much more lively and had better drivability than without them on 93, with an appropriate tune of course! Once they have this it will really showcase their manifold design. If I hadn't already sent a MY17 manifold out for extrude honing, I'd commission Racer X for a similar design to what they came up with slightly shorter runner legs. But I got curious.

[Kodename47]

Originally Posted by PulsarBeeerz

Though the runners are larger and not hurting VE on pump gas, will the added length hurt VE and top end performance at higher rpms where the knock resistance of E85 becomes advantageous?

How does VE change with changing fuels?

[PulsarBeeerz]

Originally Posted by Kodename47

How does VE change with changing fuels?

It does not with change with fuels. Different fuels are just able to take advantage of it, differently. Some fuels need to pull timing from the VE optimization causing knock at a given rpm, while others don't need timing pulled leading to higher cylinder pressure and more hp.

[evoto86]

Hoping this is the answer to surpassing the 200whp barrier without opening the engine

[Lantanafrs2]

Anybody order one yet?

[Dr. BRZ]

Originally Posted by Lantanafrs2

Anybody order one yet?

I'm just waiting for the numbers to come out so I can pull the trigger. Now if they were to offer a group buy discount, I'll definitely be one of the first to buy. Just throwing out an idea!

[Dr. BRZ]

Patiently waiting for an update!