Reason116

I decided to make a post about my car because people seem to have taken interest in it & the new Himni Racing turbo kit I'm using. They built the car & did all the work but I will try to answer questions anyone has & touch base on a few I've already seen. Besides the turbo kit its self, the car is pretty much stock with the exception of some normal bolt ons. (3" exhaust, pulley, clutch kit, etc) The engine is all original (OEM)& has over 119K miles on it. I can’t thank HR enough for their professional work & service. Those guys are great & went out on a limb to make this happen for me. They have a long history with turbo rotaries & were well known for all their top notch work in the RX-7 world. Their prices are on the high end side but hey, the good stuff is well worth it. I admit that I beat on my engine pretty hard before it was boosted & was surprised it made so much HP. I was only looking for about 270 HP but they blew it out of the water with 310 WHP at just over 8 psi. The 1st day out of the shop.. I raced a moded FD RX7 & beat it! I flipped out J Anyway… more car info below.

Daily driven 04 Mazda RX-8 6 speed/ 6 port w/ 119K on body & engine.
The HIM-N-I kit I’m using is called the HR GT35R FE turbo kit. It uses an all ball bearing Himni modified Garrett GT35R water cooled turbo (T4), Tial 44mm MVS wastegate, Tial QR BOV, all stainless steel everything. (manifold, 3” full flow downpipe, dump tube, lines & so on. It spools sooo fast… A lot quicker than I excepted & full boost by 4000 RPM. I had extra space from when I remove my A/C, so they routed me a open air wastegate tube that dumps under the car. Braaap!... like music! The intercooler is a mishimoto core with custom end tanks. The car still uses the stock radiator & runs just as cool as stock even in FL heat because the I/C isn’t some over size slab of metal. It still lets plenty of air go over top to the radiator. The engine management is a custom Microtech plug & play just for the car. My gas mileage is about the same as stock unless I get heavy footed & then she’ll eat some fuel J But I normally spend the same in gas commuting to work each week as I did before. They did a lot of testing with different engine managements, manifold & downpipe designs. I think I saw 3 different manifolds in total before they designed on the best one. I was worried when they said I didn’t need aftermarket ignition coils or fuel pump for the power I wanted but they were right. They installed new OEM coils & fuel pump because mine were getting old & 4 large 850cc (I think that is the size) fuel injectors. Everything about the drivability is really easy. No funny bucking or hesitations that I’ve read about with some turbo 8’s. Even starts better than stock & I don’t have an 05+ starter yet. It was street tuned & tuned on a dynojet brand dyno, about 85+ degrees temp that day. Low boost is 6 psi & the 310 WHP high boost is 8.4 psi. I’ve been driving the car without any issues for over a month now. Later I’m going to get a HR rebuilt engine so I run more boost. Can’t wait to see what it does with higher boost pressures.

I will take better pictures of everything tomorrow & post them here.

9krpmrx8

iTrader: (46)

Interesting way of doing things on a MAF based car. But if it runs like you say then awesome.


But the date on the dyno graph is interesting.........................

comebackqid

iTrader: (13)

definitely want to see more pics, esp. the heat shielding on the OMP, and the modified thermo housing. I hope it holds up and last you many boosted miles of bliss it would be great to have another (reliable {some companies made some doo doo kits.}) option for FI for the 8

firecran

iTrader: (3)

I seen this car, big thumbs up!!

bse50

310 rwhp with a gt35 series turbo?
lol.

olddragger

iTrader: (3)

It looks like a neat install. The main thing is that you are satisfied.
You live in Florida and you removed your air conditioning? Wow--it must get hot?
Removing the a/c will sure help--space wise and in cooling--since the a/c condensor is no longer there in front of the radiator/

Chris

iTrader: (10)

you may want to get something a bit better to protect the ecu from heat. The blanket should help out a lot, but the gold dei stuff only goes so far.

9krpmrx8

iTrader: (46)

Well considering the dyno graph shows a date of 05/15/200x I am a little suspicious about those claims myself.

bse50

Yeah, that may be a typo or they just didn't fill in the date though.
I don't see why anybody would trade spooling times for a bigger, unnecessary turbo for the same power output.

It's going to be fun to see a gt35 run on oem coils and a random fuel pump. The 44mm wastegate is going to be barely sufficient as well. Definitely a decently built yet poorly engineered kit.

9krpmrx8

iTrader: (46)

The date of the file should be generated by the computer.

Chris

iTrader: (10)

if the computer date is off the programs date would be off too

9krpmrx8

iTrader: (46)

Yeah they probably turned the "automatic time update" feature off .

bse50

The power dropping off at 8 and then 8250rpm rings more bells than the date itself if one were to question the dyno (which i'm not, anyway)

9krpmrx8

iTrader: (46)

I really hope it is a legit graph, 310WHP on the first crack is pretty impressive.

pdxhak

iTrader: (2)

Any graph with AFR and boost?

Reason116

It's not on a MAF anymore. The Microtech uses a MAP sensor. Their 1st design with the Cobb was a 3 1/2" I/C tube but when they deiced on the MT, they changed the pipe to a 3" to reduce charge pipe volume & speed up air flow.

The dyno date doesn't effect how it reads the power. It's just part of the optional general info that can be entered, if you care to add it. (name, date, car, mods & other random info)

9krpmrx8

iTrader: (46)

http://www.flickr.com/photos/9krpmrx8/7420757962/

Reason116

Thanks man! Me too. The shielding around the OPM isn't that much. It didn't need overkill because of the way they made the manifold to move around it. It has good space. I could easily add more shielding but it been fine. I've driven the car for almost 14 hours straight & never a problem & do drive it everyday.

Reason116

9KRPMrx8, Its the OE MAF but no longer controls anything on the engine. They mounted the MAF back just in case they wanted to play with the Cobb more, while they tested. A vacuum hose from the engine goes to the Microtech now & does all the adjustments with manifold pressure.

Reason116

This guys ^ car is insane!!! You have me thinking

Reason116

I saw it happen. I think some of the other kits were just made without testing. HR knows their ****! I actually have video of the car on the dyno that shows the boost gauge at full boost & I think it pans right over to the dyno & shows the HP. I'll check my cam & post it up for you. I'm not trying to deceive anyone. Just love my car now & wanted to share.

Reason116

It full boost by 4K. That's fast! I don't even need full boost by then. The fun spot is mid- top end anyway. Comes online quick on the street. The GT35R isn't really a big turbo. Or maybe that's what you were saying? They did all the math & tested before selecting their 35R. The Tial 44mm actually over board to be safe. I've seen other kits using the 38mm with no problems. With the 44mm is does hold 6 psi (low boost) steady to redline & each gear. It wouldn't control low boost is it was too small. High boost pressure only. So fare no problems with the OEM coils & new OEM pump. If I go up to the 400 HP mark latter, they will change the coils & pump. They said both are good for 330-340 & have been right so far. Poorly engineered? This might be one of only RX8 turbo kits that has been tested & retested with real R&D & you want to knock it? I think Paul at HR knows what he's doing. Those guys were making the most sought after RX-7 turbo kits before our cars were even a Mazda thought. It's not like place that only turned up after the RX8 did. IDK but I love this car now!! It's fast, on problomes, spools fast & hauls a$$ is the straights now too. I'm happy!

Reason116

They tuned out the dip in the graph & is why it's highlighted I think. You can see the over lapped runs where one dips more. That's were they tested if it was rich or lean there. I think adding more fuel on that spot made it dip more so they pulled some out right there to level it out clean. It's was gone shortly after but not sure it I snapped a pic or not. I was running around all happy

9krpmrx8

iTrader: (46)

Gotcha.

Reason116

pdxhak, I don't have a graph but they tuned it to 10.9- 11.0 AFR. I have a boost gauge vid under full pull but never took a pic when the AFR was on the computer.