Few questions on bigger injectors

[Guardiannknight]

Ok, I've started tuning my car again, gave up last year, since the laptop I had, kept locking up from over heating... And in short the laptop died a few months ago. So, I bought me a nice ASUS laptop and all it good :)

So, now that I've been tuning and getting my car running better and picking up my lost HP from the KR I have with or with nitrous. I'm tuning for every 10 degrees of temp for with and with out nitrous. The shot I'm running right now, and that I'm tuning on is 83hp to the crank, forget the jet right size right off.

But, I've been searching an reading for a while, about people saying if one goes up to 100 dry shot, that they need a new in-tank fuel pump and bigger injectors. Right now, from the scans I have ran with the 83 shot, my injectors hit 80% at one peak, usually they run around 74 to 78%. So, I'm not sure how another 20hp or so will effect the injector duty.

So, my first true question is. On the HP tuner side, with larger injectors, all i should need to do is change the "Flow Rate vs KPA chart" correct? Now in doing this will this mess with my current tunes? Which is no biggy if it does, I'm just curious in how much it will change the tune if it will at all.

2nd question :D Where to find them at. I have not searched on where to buy them at, so I will be doing that unless someone cares to suggest a good website or place to buy them from.

And as for the injector size, I'm guessing 36lb injectors should be plenty. I will probably be going with the walbro in-tank pump, think I saw it for around $100 some where. Also, I guess I'll be installing it the hard way, dropping the tank, since I don't really want to cut into the top.

So, if anyone has a link to directions on installing injectors and installing the new fuel pump the hard way, I would be thankful. If not the Haynes book may explain how, not for certain, I need to pull the book out and check.


Thank you for any info you can give,
Jeff

[ssms5411]

Re: Few questions on bigger injectors

36lbers should be enough , I 've been running them for 6 years even with my nitrous I had. With a wideband and hptuners to scan they should be not be to hard to tune it. Ebay has walro's for like $100 , I got the walbro high flow , Edmorradparts.com you can pick up 36lber or really (33lbers) on on cars for like $60. I bought like 2 sets from him. 1 for a spare set. I'm going to go with 65lb injectors for my turbo, there not hard to install just watchout for the injector clips, they can fly off and you'll never find them again. And just use a little oil on the O rings so they go in easier in the seats. Fuel pump I cut the top best thing ever, esp. if something goes wrong like with mine I had to go back in 3 times.

[Guardiannknight]

Re: Few questions on bigger injectors

Hey, thank you for the info. I figured injectors would be more than that. So, $60 for six injectors or is that per each? Not a bad deal if it's for all six injectors. Sounds like the install is going to be the biggest pain. Around $200 for a fuel pump and injectors is not bad at all. :)

I have read a little on cutting into the upper part. Would that not cause the car to rust later in life in that area? Or be more prone to rust? Everything seemed like it would be pretty good to go in from the top, except the one part where you have to cut right over the fuel line. That seems a little :eek:

[ssms5411]

Re: Few questions on bigger injectors

Its just for all 6 since they are used GTP injectors. Its really not that bad cutting it, I just cut half out then got a better look at where the fuel lines were. Then I felt alot better cutting.

[Guardiannknight]

Re: Few questions on bigger injectors

Thank you again for the info. I checked the website out, I'm kinda iffy on getting used injectors, would rather have new ones. I checked out turboV6's site, and checked out racetronix. Now my question is what brand do i get... Also, I was checking out Thunder racing and they have a Holley 255 intake fuel pump. Has anyone used a holley intake before?

Thanks again,
Jeff

[Guardiannknight]

Re: Few questions on bigger injectors

Well I have searched and searched and searched for 36lb injectors. Not for certain what would be a direct hook up. Found these on summit.

http://store.summitracing.com/partde...98+4294840140+

Will those be a direct replacement. I'm trying to find some, so I will not need to do any wire cutting if all possible.

Any help or info would be great.

[ssms5411]

Re: Few questions on bigger injectors

I've been running EDMorad $60 used injectors for over 7 years now with no problems, I would just go with used GTP injectors for $60. For that price you could get 65LB ZZP Motron injectors for $340 shipped. I have a set I will probably use when the turbo goes on, because i don't think the GTP's will handle my boost, but I will try and see though.

[Guardiannknight]

Re: Few questions on bigger injectors

I checked EDMorad site but I couldn't find any GTP injectors. Do you have to email them? or should the injectors be listed on the site?

[ssms5411]

Re: Few questions on bigger injectors

I would email him, or go with the 65lbers from ZZP if you have the cash, more growing room.LOL Once I get my 65LBers in I will probably sell a set of my 36lb(33's) since I'll have a extra spare set. I like to keep a spare set handy. You never know when your going to need them.

[Guardiannknight]

Re: Few questions on bigger injectors

So the 65lb on ZZP, are they direct fits? Also, would I need to upgrade any of the fuel line other than the fuel pump?

I'm guessing these are the 65lb injectors?

http://www.zzperformance.com/grand_p...=248&catid=113

Also, where did you buy your walbro from?

[97rs4life]

Re: Few questions on bigger injectors

65lbers are going to be way overkill for your car and I would suggest not going that route. Just keep an eye on the for sale sections of clubgp.com and 3800pro.com for some GTP injectors.

You will have to get the injector adapters to use them on your 00 car. Or splice in your own.

[ssms5411]

Re: Few questions on bigger injectors

So the 65lb on ZZP, are they direct fits? Also, would I need to upgrade any of the fuel line other than the fuel pump?

I'm guessing these are the 65lb injectors?

http://www.zzperformance.com/grand_p...=248&catid=113

Also, where did you buy your walbro from?

I just noticed your a 00' so yes you will need adapters to run the 36lb and I thought you were a turbo vehicle , but I saw your sig for the nitrous , like 97rs4life said 36lber's will be fine for nitrous , I had zero trouble with a 125 wet and then switched to a 125 dry shot without problems with the 36lbers. I got mine on ebay for like $100-$110 shipped or something like that. I got the high flow version which is good for boosted vehicles where the fuel pressure doesn't fall off as quick as a reg. walbro acccording to their graphs they showed. I got it when I had the powerdyne but I'm glad because I'm going turbo so my pump should be fine. Let me see if I can find a link for the walbro for ya, or if 97rs4life has any good deals on walbros , might want to PM him. Also if you can't find any extra injectors I'll go ahead and sell you my extra set, which I ohm tested them and they came out fine when I got them but I would soaked them in seafoam before you put them in, since they have been sitting in a bag for 2-3 years so there is no carbon build up on them. Let me know if you don't find some and I'll sell them to you for $70 shipped since I don't know how much shipping will be on them and I think thats how much I paid shipped. They have the O rings still on them I believe, but might want to spend $5 on a new set. And you will need the wiring adapters for them too.

Kind of like this one but I will check the part # out to see if it fits a 00'.


http://cgi.ebay.com/ebaymotors/Walbr...1%7C240%3A1318

[ssms5411]

Re: Few questions on bigger injectors

I think this is the right one the GSS341 or if someone can correct me for a 00' fuel pump.

http://cgi.ebay.com/ebaymotors/Walbr...1%7C240%3A1318

[Guardiannknight]

Re: Few questions on bigger injectors

Question, if I do go with the 36lb injectors will they be able to hold the 100 plus shot with a stage 2 kit from SSM? I plan on doing that next year. If I did get the 65lb injectors, would my car run bad, even if I tuned for them? Also, if the 65lb would be over kill right now, and I did get the 36lb, where do i find the adapters? Also, 99rs, i noticed on your website you have a walbro 255, would that work for my 2000? Or should I go with the one off ebay that ssms5411 linked? Just want to get everything worked out so I order the correct stuff, plus would love to start running the 100 shot :) I have a B&M inline fuel pump, but the hoses that came with it, are for fords.... don't know how that happened... but, that is why I just want to make sure I get everything correct before I order this time around :)

Thank you both for your help on this :D

[97rs4life]

Re: Few questions on bigger injectors

100 shot on a stock engine is fine with stock injectors on some cars, watch the scanner and check the figures. With headwork then yea the 36#s are fine even with the nitrous

that ebay link is going to be the cheaper route for you to take. Hard to beat $100 for a new pump if it is actually a real walbro. There are fake ones out there.

The ones on my site take about 10-14 days to come in from granatelli. Usually I have one on hand but I have sold the spare, so at the moment I would have to drop ship it to you directly from granatelli and so there would be a bit of a wait for it