Bigger Pulley = Bigger Smiles!

[tann3r]

Made the move from a 115mm to a 120mm and I couldn't be happier. Only took a small adjustment to the PCPro and E-Cool and AFR is perfect.

I may have become jaded to the 115mm pulley, but there was a noticeable increase in power. Pulls even stronger that it did before. Wonder how long I will be satisfied with the power before I need to try out the 125mm.

I am hoping to be back at the track next month, that will be the true test.

Thanks for the pulley Chip and thanks to Tom for putting out this great kit!

[socal pat]

OK, you did it for me. I'm meeting Tom and/or Bill for a dyno next week and was considering the jump from 115 to 120. Hear that TOM? If you bring a 120mm I'll bring the check. :)

Colin, I know what you mean though. The move to the 115 is a pretty nice jump in response and low torque. I can just imagine the 120 or dare I say it? The 130 ;)

[tann3r]

Pat, after your first drive you'll be wondering why you didnt do it sooner. Its just enough to keep you happy, but not quite enough to quell the thoughts of a 125 or 130.

If there is a 125 or 130 floating around out there I could be convinced to give it a shot :D. Tom what do you have on those shelves of yours? ;)

[bogey]

Can I have your 115 pulley? :drool5:

[tann3r]

I am going to hold on to the 115 through the summer just in case I have any problems in the 100* summers we have down here. If all goes well it'll be for sale around September. I do have a 110 for sale if anyone is interested. ;)

[chuckerants]

You lucky CS guys.

I tried going up to a 125mm from my 115mm and I just had too much pinging that I didn't have have time to tune out.

Maybe next winter I'll give it another go at the 125.

[MikeyLikesIt]

OK, now you guys have me convinced as well. 120MM here I come!

[tann3r]

Chuck, Were you running any timing control or water injection? I have a buddy running 65/130 w/ the TDR intercooler, and he is not having any problems.

[Steve in VC]

Any dyno results?

I was looking to jump from a 105 to a 120 in future.

[tann3r]

I havent had a chance to get to the dyno, work has me traveling...alot. Hopefully I'll get a chance when i get back in a few weeks. I plan on hitting the track on the weekends, but if I find some time during the week I'll see what i can arrange.

PS. Someone buy my 110mm pulley!

[HotsideHamid]

Right now on my hotside I'm using a 125mm pulley. I also have the TDR IC and Hydra with 550cc injectors. It has been running really well and is a blast to drive. BUT.... I think I'm going for a 135mm pulley soon. Maybe. I will dyno tune it at that time however, and have it done right. I have also talked to Gary at TDR who says it should be fine on the stock block if I don't race it too much with that pulley. I haven't been in the track in years and I have my first baby due on July 26th, so I doubt I'll get out there anytime soon! I'm addicted to this power dammit! I'm prolly going to buy the hiflo manifold too before any pulley changing. But I'll tell ya, Toms pulleys are habit forming!

-Hamid

[tann3r]

I agree, I'd like to have a 125mm to test this summer, but I am not sure I have the injector to keep up with it (315cc).

Tom, what injectors were you running when you had the 130mm? Did you have to turn the E-Cool up to compensate for the 4 mains?

[tann3r]

Initial track day testing of the 120mm is complete and I'm really pleased. 30 min sessions in mid 80* 60% humidity and no ping. Should be hotter next weekend so I'm interested to see how it goes. I may try to get a bigger pre-blower WI nozzel to keep things from getting too hot.

Lap times were coming down as I was getting to terms with a section of the track that recently got resurfaced. I managed to get really close to my personal best in spite of babying it through one of the quickest corners. A panoz thought the back straight and the following corner was where you deposit your oil. It was also the first time on the new suspension and I'm learning to dial in the valving.

I did manage to get a 125mm (thanks Peter!), so if all goes well next weekend, I will give it a shot.

Tom, quick question. I havent had a chance to see how much boost I'm running (gonna check tomorow) but onthe E-Cool card all 8 lights light up. Am I going to run into any issues running more boost through it? is there a limit to what the boost sensor in both cards will take? Also is there a way to change the scaling to better support high boost? And finally, is there a way to pull out some fuel in boost but at part throttle? I'm seeing a really rich condition during partial throttle in boost.

[tann3r]

also for those of you interested in a 110mm or 115mm pulley...

http://www.fastforwardsuperchargers.com/forum/showthread.php?p=18205#post18205

Show your support for the more boost fund! :D

[tann3r]

Another update, the 125 mm pulley is now on and I finally got around to rerouting the the bypass signal and the IAC lines like Tom recomended. My results are great! No more hard brake pedal. I also finally put my boost gauge back in.

The 125mm feels great. As a precausion, I bumped up the Y/B 1 light and went for a shake down run. Was a little rich and ended up back where I started with the card settings. I'm making ~13.5-14psi at redline.

I'm already thinking about calling Tom about a 130 or 135. I should probably quit while I'm ahead but there is just that feeling that there's more power to be had.

[FormerDatsun510Man]

I just put a 130mm pulley on mine along with a stock TB. Runs 15psi at redline. One note is I found if you turn up the E-Cool and turn down the main injectors the same amount you can further improve the ping threshold with higher boost pulleys. FWIW, on 93 octane, I found by turning up the E-Cool 2 lights and the Main Card a similar amount I have no ping with no timing retard. I went ahead and put the timing retard up to the defaults as precaution (0-1.5-2.5/G-Y-R) though. Of course, don't do this without a wideband! I am seeing 11.5-12:1 a/f ratio.

Bill

[tann3r]

Thanks fo the tip Bill. I have the water injection running for charge cooling, but I will bump up the E-Cool 1 notch and drop the mains.

Another thing that I gave been logging is the long term fuel trim as i'm running 315cc injectors. I think I'm pretty close to the limit of what the stock ecu can handle. It's at -10% most of the time and occationally goes up to -15%. IIRC much more than -15% throws a CEL.

[Tom @ Fast Forward]

Hmm. 315 should have a LTFT closer to 20%. 280 will give 15%.

[tann3r]

I thought The LTFT would have been higher as well. I'm running the purple 01+ injectors that I sent out to get cleaned and flowed. I was surprised when the spec sheet came back saying that they were 315cc/min @ 3bar.

Also does anyone remember who drew up those vinyls with the FFS logo? I was thinking about getting a batch cut if that's ok with Tom.

[Tom @ Fast Forward]

01-05 are 280cc.

I just happen to have a couple of those if you want one for your car. One of my customers in CA put it on his rear bumper and it really looks GREAT there. I like it better than my windshield.

[tann3r]

I'd love a big one for the windshield, maybe another one for the hardtop if it'll fit. Just to let people know whats powering the little miata that blew by them.

At the track I always get a few people wondering whats under the hood.


FWIW here's the spec sheet that came back with the injectors.

[Tom @ Fast Forward]

Well, the stock injectors on the 99 are ~240. 315/240 = 1.31. The LTFT should need to trim 31% to get them back to 1. 280/240 = 1.167 or ~16% to get back. I had 280s on my 99 and my LTFT was right at 16%. Don't know what to say.

[FormerDatsun510Man]

It is possible the fuel trim would be shifted to the 0% point at a higher cc point if the MAF screen is removed (not sure how much as I haven't done back to back comparison of voltages with and without the screen). Also, there are other variables such as lower fuel pressure, if the IAT moved somewhere where it gets a colder reading than what is actually going in the air filter, etc.

I like the bumper sticker idea, I got a scratch on mine so it would be a good coverup. Besides it is the more likely place most encounters will have time to read anything lol.

Bill

[tann3r]

I really dont know what to make of it either. Maybe the LTFT with the stock injectors is +X% never really paid attention to it.

Either way, its working and I'm not going to complain :D

[tann3r]

Another track weekend, this time with the 125mm pulley. It was the hottest weekend I've ever had on track. Temps were 104* and about 60% humidity. It was not the most plesent weather but nothing can dampen a weekend at the track.

I managed to get through the weekend ping-free and without overheating. Power seemed down a little but I attribute that to the absurdly high air temps.

All said and done great weekend!

[Tom @ Fast Forward]

All you need now is Ari's CAI and it will be even better.


Another track weekend, this time with the 125mm pulley. It was the hottest weekend I've ever had on track. Temps were 104* and about 60% humidity. It was not the most plesent weather but nothing can dampen a weekend at the track.

I managed to get through the weekend ping-free and without overheating. Power seemed down a little but I attribute that to the absurdly high air temps.

All said and done great weekend!

[tann3r]

I've been considering it. I currently have the air filter in the passenger fog light hole but I kind of want to put an oil cooler there.

We will see what the budget allows.

[Tom @ Fast Forward]

Oil cooler can go anywhere. Just having an extra quart of oil and a large glob of aluminum to dissipate the heat is a 100% improvement there.

[ThomS]

Oil cooler can go anywhere. Just having an extra quart of oil and a large glob of aluminum to dissipate the heat is a 100% improvement there.

Is that what the oil change should take now is an extra quart with the oil cooler?

[Tom @ Fast Forward]

More or less.

[tann3r]

Just keep adding until you hit the full mark on the dip stick. Buy however much you put in for the next change. Be sure to check it after you get the oil up to temp if you have a thermostat in your system.

I settled on the FM oil cooler and am going to duct fresh air from the driver side fog light hole. I think I found a heating duct that will fit the cooler and it funnels nicely down to a 3" hole. Should be here on Friday. Hope I have time this weekend to get it all installed.