24OZ

Since we are talking about the stock BOV. Would you have to remove it and cap it off if you were going to run more then 10psi of boost?

I have one and I'm running 7psi so i cant really talk but... as someone else said, if you are using the turbo manifold their is a BOV between the 3rd and 4th runner. Also some say that adding an aftermarket BOV that vents to atmosphere is not technically a good thing to do if you are running the L Jetronic EFI since the very nature of the EFI system uses an air flow meter to measure the exact amount of air entering the engine and a BOV would release that air that was already metered. The result would make the engine run rich which isnt necessarily a bad thing for a turbo engine but isnt efficient either.

This is something i have been waiting to hear! So basically I can run stock fuel pressure for a turbo motor, ie.. 30psi at idle and 36psi at WOT. I did not like the idea of going to 50 or 60psi of fuel pressure, something would have popped! Thanks Drax.

Watch out guys I fell for the same mistake, this IS NOT an original Turbo Tom Setup, note that he states TURBO TOM STYLE.

I forgot to mention yesterday that I am using the NA Air Flow meter, due to it's internal size being smaller (less airflow) maybe I would need less fuel pressure at WOT since I wouldnt be taking in so much air and therefore wouldnt be leaning out so much to warrant 50psi?? Just a thought, would be interesting to hear what you think.

That makes total sense, now I understand. To recap: The turbo ECU would have give the injectors an increased duty cycle at 7psi but when using the NA ECU at WOT the Duty Cycle will be a lot shorter, hence the need for more fuel (pressure) to gush into the injectors to compensate I think I learnt something tonight!! One other thing, I am using a stock 280ZX pump, would i definately have to upgrade? I am going standalone next year so duty cycle can be increased and fuel pressure lowered.

Thanks Neinberg for the advice. One thing I can't seem to understand though is that why would I need 50psi of fuel pressure at 7psi of boost, when the turbo FSM states that fuel pressure should be 30 psi at idle and at WOT it should be 37psi. Now stock turbo pressure is 7psi on the ZX Turbo so I would assume fuel pressure should be 37psi at 7psi of boost and 50psi fuel pressure would be too much.. Am i reading this incorrectly.. Thanks for trying to help me understand this!

Clifton I am using something similar to this http://cgi.ebay.com/ebaymotors/Rising-Rate-Fuel-Pressure-Regulator-FPR-30-70-psi-Adjs_W0QQcmdZViewItemQQcategoryZ33742QQitemZ8019650720QQrdZ1QQsspagenameZWD1V#ebayphotohosting , I am using stock 280ZX turbo injectors, i thought i would need this product so as to add more fuel when boosting, are you saying the stock FPR is all i needed? Dang, if that is the case I wish i new it before I bought it. Appreciate everyones help on this.

Thank you Drax.

Thanks for the responses guys. From what you both have said I understand that a 1:1 ratio FPR is what i need. Pyros I am using the turbo injectors so i think 37psi of boost will be fine at my max of 7psi of boost, since 7psi is the stock boost and the FSM states 37psi at WOT. Please can someone confirm I've got this right. With regards to the NA Dizzy, I will be keeping the vacuum advance but blocking off the mechanical advance, I've been told to set initial timing to 10degrees BTDC. Appreciate all your comments.

Hi GuyZ, I am running a 240Z with stock L28ET running 7psi of boost and im using the N/A Loom and N/A ECU and Dizzy from a 280ZX - (A BAND AID for now) I am looking into getting a Rising Rate FPR but need some advice as I'm finding it confusing as to which one I need to purchase. When looking at my Turbo FSM it states that idle fuel pressure should be 30 psi and at WOT it should be 37psi. When looking on ebay for an FPR most state they have a 12:1 Ratio. From my understanding, this means that if I set idle fuel pressure to 30psi then with 7 psi of boost, fuel pressure will be 12x7psi = 84psi plus the idle which is 30psi so that makes 114psi fuel pressure when boosting at 7psi. Is that correct? If so why would anyone use one of those? I have noticed some units have a 1:1 ratio which sound as if they are the ones i need to go for, please confirm. Thank you all.

Thanks for the clarification guys.

Nice write up Grayzee, But i am confused as i think there is 3 contacts on the TPS plug, which ones do you cross? Thanks.

Yes the Saab 9000 can bolt it but it has plastic end tanks and because it is quite large sits a little too low for my liking.

Thanks for your comments, what do you think about the radiator being physically smaller then the stock one?

Guys, I picked this Custom IC set up from a garage sale and want to know what you all think. It has been specially designed to simply replace the stock S30 radiator and for this reason it will be a very easy IC to fit. (notice the radiator mounting bolts on the side) The dimension are as follows: The IC part is 3 1/2 Inches Deep, 8" wide and 20.5" long. The inside of the IC is made of 3 large thin cores (only 2 are viewable in this pic): The Radiator part is 17" wide, 2 1/2" deep and 20.5" long, its 3 core. What do you all think? How much boost do you think it can handle? I am thinking of only going up to 12psi to be safe. As can be seen my radiator will be smaller now, do you think this will cause cooling issues?

Just trying to get my head around that wouldnt having it connected help with additional fueling at WOT and therefore help increase fuel needs when boosting?

The only two gears i leave it in is REVERSE if I am facing down a slope and 1st gear if i am facing up a slope, but I aways sue handbrake too, as handbrake cables can snap too.

Once you leave a car in gear I thought it was impossible for it to roll?? Glad all turned out ok in the end. Great line violacleff!!

The best place for you to start your research is here: http://www.atlanticz.ca/zclub/techtips/turbo/index.html

That is a great thread and explains very well how a 3" DP is overkill for use with a stock T3 turbo.

Looks amazing Pete. You can see the difference is night and day over the stock unit. Beautiful piece.

How about getting in touch with the Z club in that area and putting an announcement on their club web site or magazine?

BEAUTIFUL Yasin! Is that a wide arch 911 Turbo?