How to go about boosting 10.5-1 CR (DSM kit)

[Accordtyper91]

So i have a pretty heavily built f22a as some of you know from my thread. Im thinking of runing like 3-5 pounds of boost through it..My dyno guy says with the high compression the boost would really bring it alive. I just dont know if i could get away with pump gas or if i would have to run e85 or race gas, which i dont want to have to do.

thanks everyone for the input

[93F22A6]

I'm no boost expert but you should be able to run more than that (8-10lbs). I think most of the varable about fuel and how much boost is going to depend on the tuner.

[acc0rd_adicti0n]

if sti's and evos can run 25+ lbs of boost on 93 octaine i dont see why you couldnt??

[Accordtyper91]

ya i know for a fact that there is no way i can run that much boost on pump gas. as i said im running 10.5-1CR so in thoery running 10lbs of boost with that kind of compression is like running close to 30lbs on a low compression motor.

[Accordtyper91]

u are not reading into the whole post.. evo's and sti's run 8.5-1 CR somewhere around there i am running way higher 10.5-1. thats the problem Its fully built forged everything and fully built head. it readlines at 8200 and is set up for All Motor but im thinking of changing it up

[sulimed]

it comes down to who's tuning

[slammed4thgen]

nitrous silly

[rexload]

I would go for it but find a good tuner who has experience boosting higher compression motors, but still 10.5 is honestly not that high.
To choose what turbo and what psi you want to run, you simply need to figure out how much power you want.

EDIT: why do you have DSM kit in your title? you can't do a basic 14b/16g/stock manifold dsm setup because it is going to be very inefficient on your built motor. You would definitely need a good manifold and a bigger turbo.

[Accordtyper91]

ya i did not think that the dsm kit would cover it...thats why i asked.. but u wthink with a good flowing turbo and manifold i could run mderate boost on premium gas without detonation.

thanks for the help

[MRX]

there are a lot of honda motors that boost on that kind of compression. The stock h22 is that high and people boost that all the time. You could get away with about 10-12 psi on a good solid dyno tune or street tune using a knock sensing device. And you'll certainly want to go with a bigger turbo. It'll cause less heat and quality air to be ingested by the motor without straining itself. Thus, the air temps won't cause pre-ignition like they will on a smaller turbo.

[F22Turbo702]

Boost it for sure! But I wouldn't use a DSM kit.

A GT30r or a BW S258 should make some great power at 10psi, and the response will be awesome with 10.5:1 CR.

-Kyle

[Accordtyper91]

ya im definantly going to see what i can do. i am running the AEM EMS so its very tunable. ya thanks guys. I just got it back from the dyno, it put down 208whp all motor so i cant wait to see what it does boosted. thanks everyone
let me know if anyone has more advice

[MRX]

I took a look at your setup and you may want to do some research on the h-beam rods you have. I'm just worried there's a possibility that they wouldn't be able to stand up to the pressure caused by the turbo.

[Accordtyper91]

bisi told me that they would hold 800hp and 30lbs of boost no problem. I will never push them that hard but they are pretty sturdy ill get u some pics soon.

[dksix]

The PSI of boost isn't really what you need to be considering . Different turbo's make different amount of compressed air . A small say T3 VS say a GT35R at the same PSI puts out a great difference in the amount of air and the air (or combustion mix ) entering into the cylinders would be what makes or breaks you engine . Any good tuner should be able to use one of the many engine calculators to determine the right turbo to give you a usable and safe amount of boost . Fine a shop that is an authorized dealer for a quality turbo manufacturer and talk to them about the correct charger for you application . I've seen a GSR take 12 psi of boost from a Garrett 60-1 , but I don't know the exact specs of that turbo and they were 10 to 1 compression . He put down 312WHp with that set up and never had any problems with the car .