supporting mods for turbo upgrade

[ANVIL]

Ok so im about to buy a new turbo, I think I have decided on the hypergear tr43i but im not 100% yet. Its a really good price and also comes internal wastegate (less modding to fit), and lots of people on SAU use it without problems and love it. the turbo is 500 hp max and my goal is around 400-450whp. anywhere close to 400 id be happy. i know I will need bigger injectors and from what I remember reading is rb25 is side feed high impedance (370cc).

so first question is, what are some reliable drop in side feed injectors? how big should I get? i was thinking of buying off eBay, seller tlfsupra89 but not sure if i should get 550 or 600. another option i was thinking of was HKS or nismo 555 for more money. also found some sard 550 on ebay,

a few other things im concerned about is if my walbro 255 could handle the upgrades? can my stock motor handle this kind of power for summer DD and drag a few times a month?

let me know what you guys think!

Modified by ANVIL at 9:43 AM 9/16/2008
Modified by ANVIL at 9:43 AM 9/16/2008

[l0nestar]

I know a certain 240z4u who has a set of 650cc side-feed injectors for sale in the classifieds....

[ANVIL]

I know a certain 240z4u who has a set of 650cc side-feed injectors for sale in the classifieds....

really i cant find the thread? searched with threadstarter 240z4u. searched 650cc injectors... still cant find it... link?

[240z4u]

ITS MEEEE. I forget what I wanted for them

The injectors from TLFsupra are garbage. I had a set that flowed so poorly I GAVE them away (after cleaning).

You need a way to control the injectors, be it piggyback or whatever.

Evan

Cut and pasted;

Deatchwerks (SP?) 650cc sidefeeds. New in March. Work great, I need bigger ones. Willing to do partial trade toward 1000+cc injectors or sell outright for 450 for the set. This is a little less than the price of the 550s they have up there right now. No lowballers.

[ANVIL]

yeah i have a power fc to control it. can you shoot me an email at [email protected] ill take those injectors from you, as long as they would be direct replacement

[ANVIL]

so should my fuel pump be ok? my motor can handle it right?

[Cjmartz2k]

I had a single walbro up around 500rwhp, but that was pushing it in my mind. I've got two now. The bosch 040 or 044 looks like a better way to go IMHO though.

O yeah, and don't skimp on injectors. I know they are expensive, but it's worth it. People talk about them not being reliable, or flowing close enough to use, and they are right. There are other things though like crappy spray pattern and close but not spot on flow matching. I had some random who know's what brand 850's sent off to witchhunter. The came back closer, but still ranging from 852 all the way up to 863cc's. We have to tune the car about .4 a/f wise richer than we want because of that. The idle is tougher to nail down too, and I'm still not happy with it. Sometimes they work, but not well. O, and that TLF guy is absolute garbage. Google TLF supra injectors and see what comes up. I'd strongly recommend Nismo's, and my friend has had good luck with Sard's in his GTR (top feeds though). Also, with a good set of injectors, you will not get worse gas milage or a ****ty idle with getting 740's and only 300hp. That's bull****.

[ANVIL]

yeah i did some research on that guy, and even my local board here in AK knows about him.

looks like im going with the 650's from 240z4u. btw, did you have them flow tested?

[240z4u]

yeah i did some research on that guy, and even my local board here in AK knows about him.

looks like im going with the 650's from 240z4u. btw, did you have them flow tested?

They flow test them before sending to within 1% matching. I can likely call and get a flow sheet sent if you really need it.

Car idles and runs great on them.

Evan

[ANVIL]

for u guys who are pushing around my hp goal, is there anything else i need to be concerned about? i just know how little things can mean long down times for rb's, i just want to be prepared

[240z4u]

IMO its wise to fix the crank collar problem, thats piece of mind for me.

You will also need the basics like a different FPR and fuel pump. Downpipe? External wastegate?

As far as reliable power, if you build a solid foundation you will be fine. Don't cut corners, use quality parts so you don't have to worry about it later.

You have a FMIC I am assuming?

Evan

[ANVIL]

well yeah I have a FMIC, walbro255, nismo fpr, and the turbo im getting is going to have an internal wastegate... ill need to read up on that crank collar issue a little more though

[Cjmartz2k]

I never trust the seller of injectors providing a flow test sheet (I'm not implying you 240z4u, I'm talking about people like TLFSupra). They are usually just something made up. I would have any second hand injectors I buy sent to Witchunter.com and tested. They don't sell injectors, they are totaly independent, and have no reason to lie. They clean them, test them, and return them to you with the results for around $100 on a 6 banger. Also, nobody modifies injectors to match each other. That is a common misconception. Most place just clean them. Getting flow matched ones means they flow test a huge batch, and match up similar flowing injectors.

[240z4u]

I never trust the seller of injectors providing a flow test sheet (I'm not implying you 240z4u, I'm talking about people like TLFSupra). They are usually just something made up. I would have any second hand injectors I buy sent to Witchunter.com and tested. They don't sell injectors, they are totaly independent, and have no reason to lie. They clean them, test them, and return them to you with the results for around $100 on a 6 banger. Also, nobody modifies injectors to match each other. That is a common misconception. Most place just clean them. Getting flow matched ones means they flow test a huge batch, and match up similar flowing injectors.

Funny you bring this up, thanks for not implicating me LOL. I had a set of injectors from TLFsupra on my car. Always ran like garbage at idle. The injectors actually varied a total of 40-50ccs (cant remember exactly) when I had deatchwerks flow test them. One of them was intermittent and would stick open

That was the second set after sending the first set back because the car always ran with a huge misfire!!! Freaking horrible.

I am very thankful my paranoia didn't allow me to tune fully on those.

Evan

[ANVIL]

about what hp range is the crank collar an issue? from what i read u basically need to rebuild the bottom end when u do that. has anyone here fix their crank and then reused bearing/rings ect? would it be ok?

i have an s1 and im guessing i might have that problem but i never checked. anyone with an s1 NOT have the crank issue to start with?

EDIT: nevermind. if i decide to pull the crank i might as well get new pistons/rods, rings and bearings. maybe ill get some rb26 rods/pistons. can the crank collar be checked with the motor in the car?
Modified by ANVIL at 9:42 AM 9/18/2008

[240z4u]

I will clear this up. You do have the problem. I have an S2 rb25det and mine was short.

Rumor has it HP doesn't matter, its luck of the draw. I did it just for piece of mind.

I did not do a rebuild. I pulled the crank, had it repaired and put it back in. This is 20k miles ago.

Evan

[ANVIL]

wow. seeing that i dont drive my car hard THAT much, and not that often I guess ill just take my chances.

with that being cleared, how many people here have actually blown their motors from this? im kinda curious

[eh?]

wow. seeing that i dont drive my car hard THAT much, and not that often I guess ill just take my chances.

with that being cleared, how many people here have actually blown their motors from this? im kinda curious

I'd save the crank collar until you need a rebuild (that's if you ever do). I've been around 400+ish whp/ 7500rpm redline for a while now on a bone stock motor. Unless you plan on going heavy with autox/road racing, I don't see the point...

[ANVIL]

I'd save the crank collar until you need a rebuild (that's if you ever do). I've been around 400+ish whp/ 7500rpm redline for a while now on a bone stock motor. Unless you plan on going heavy with autox/road racing, I don't see the point...

why is ur redline so high? still making power that high on the stock head??

[Cjmartz2k]

Shoot, I'm making over 600 at the crank now and spinning it to just under 8k, and I'm having no problems. Also, I'm still making power up there, but I've also go a pretty big turbo and 264 cams.

Like was stated above, I think it's luck of the draw with the crank collar.

[240z4u]

[QUOTE=Cjmartz2k]Like was stated above, I think it's luck of the draw with the crank collar.[/QUOTE

I 100% agree its luck of the draw whether or not its going to damage anything. The reason I did it was because this car is my daily driver and I can't swing by the junkyard for another motor if this one goes kaboom.

Now if I blow it up screwing around due to a bad tune thats my own fault! lol

Evan