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-   -   Want more/earlier boost from your HT18 (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/want-more-earlier-boost-your-ht18-533585/)

SureShot 04-25-06 01:43 PM

Want more/earlier boost from your HT18
 
All the drivers at the Deal's Gap Rotary Rally heard this thing.
I was running low boost the whole time.
Nice quiet ride up there, then unleash the beast!

http://208.62.166.66:82/guest/pics/9...st valve22.JPG

arghx 04-25-06 01:44 PM

ok i was at deal's gap (although I doubt I noticed you among the whole crowd) and i don't get it, call me dense

SureShot 04-25-06 01:49 PM

It was louder than the RX-3 (of course he had his baffles in)

It was sweet at full song in the canyons.
I did close it in the parking areas.

RotaryEvolution 04-25-06 01:54 PM

your exhaust is afro-rigged

spot_skater 04-25-06 02:02 PM

What is that? Electric cut-out?

EDIT: Just read your sig. I am a jackass.

A buddy of mine had one of those right off the downpipe on his STi. Sounded like a fucking chopper when he opened it. Said he noticed a nice change in power with it open.

SureShot 04-25-06 02:04 PM


Originally Posted by Karack
your exhaust is afro-rigged

The rest of the exhaust, including the cat, is factory STOCK!
This whole mod goes in place of the pre-cat.

So maybe you can weld prettier than I :)

RotaryEvolution 04-25-06 02:07 PM

lol i know, i was admiring your 80mm to stock conversion.

SureShot 04-25-06 03:00 PM

The biggest difference shows in 1st & 2nd gears.

Closed I get 5, 6, 11, 12, 12 PSI
Open I get 10, 11, 13, 13, 13 PSI

SureShot 04-25-06 03:06 PM


Originally Posted by Karack
lol i know, i was admiring your 80mm to stock conversion.

It's the "I can teach myself how to weld" job done with a hacksaw, a hammer, and a borrowed MIG welder.

88rxn/a 04-25-06 03:27 PM

5 to 10 lbs. in 1st
nice
hows the flames underneath the car??? lol

tIIforever 04-25-06 05:09 PM

is it over boosting looks like it would

SureShot 04-25-06 06:37 PM


Originally Posted by tIIforever
is it over boosting looks like it would

The MBC is set for 12 PSI.

Under most conditions the ported waste gate keeps it under 13.

On cold mornings I keep the dump valve closed or it will creep to 14-15.

My ground clearance is 4.5". The exit flange is 3.3"
I suppose if I reved the engine in one spot too long it would melt the tar in the road.
Of course it has to be closed over grass.

bamabubba 04-25-06 07:05 PM

^ Thats friggin cool as hell. LOL @ melt the tar on the road.
Jeremy

SureShot 05-01-06 08:19 AM

I started getting high boost fuel problems.
I had the boost controller set too high and did a test with the dump open on a cool morning.
The boost spiked and it blew off the FPR hose under the UIM.

The lesson: zip tie ALL the hoses and don't open the dump on cool mornings.

I had been warned - boost is addictive - IT IS!


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