g54beast Posted September 23, 2005 Report Share Posted September 23, 2005 I'm building a high boost g54b (50lbs+) and its time to buy injectors. Running t76 turbo and 150 shot of nos. Aiming for 700+ hp. I am using mega squirt for fuel management, aem rrfpr, and aeromotive a1000 fuel pump. I'de like to get opinions and/or feedback on what size injectors would work for this set-up. I was considering 1600cc injectors but they would kill any drivability... Let me know what you guys think. Link to comment Share on other sites More sharing options...
jr_ss Posted September 23, 2005 Report Share Posted September 23, 2005 To be honest with you, that car with the T76, you've already killed driveability.... Hope you have alot of money poured into the engine, because it's going to take you more than one motor to reach that goal. Good luck to you though. Link to comment Share on other sites More sharing options...
Questsi Posted September 23, 2005 Report Share Posted September 23, 2005 To be honest with you, that car with the T76, you've already killed driveability.... Hope you have alot of money poured into the engine, because it's going to take you more than one motor to reach that goal. Good luck to you though. werd Link to comment Share on other sites More sharing options...
g54beast Posted September 23, 2005 Author Report Share Posted September 23, 2005 I've spent too much money on this motor, to turn back now would just be a shame. This project is now at $12,000 and I hope its not going to cost me more than $5000 more to finish. I have to beat my little brother down the 1/4 mile.....I'll do whatever it takes..... Link to comment Share on other sites More sharing options...
Brown Posted September 24, 2005 Report Share Posted September 24, 2005 What is he running? Link to comment Share on other sites More sharing options...
g54beast Posted September 24, 2005 Author Report Share Posted September 24, 2005 My brother is building a chevy 383 stroker in a 1974 datsun 260z. He's also aiming for 650 - 700 hp. He bored the cylinders .060 over so he is going to have a great deal of torque. We are both looking for t56 trannys but, the only ones in our area are going for $1500.00. I think I'm just going to see how much abuse the stock tranny will take before it gives up. If all else fails I also have a 350 small block that I can build up and a 700r tranny with a slap shift. I just really want to beat him with the g54b. Link to comment Share on other sites More sharing options...
Rocketman1000R Posted September 25, 2005 Report Share Posted September 25, 2005 Email Ed at FIP he might help but since you have mega squirt Im not sure but I know he would know. Who built your motor and what did you get done to it. Link to comment Share on other sites More sharing options...
Boosted_One Posted September 25, 2005 Report Share Posted September 25, 2005 I'm building a high boost g54b (50lbs+) and its time to buy injectors. Running t76 turbo and 150 shot of nos. Aiming for 700+ hp. I am using mega squirt for fuel management, aem rrfpr, and aeromotive a1000 fuel pump. I'de like to get opinions and/or feedback on what size injectors would work for this set-up. I was considering 1600cc injectors but they would kill any drivability... Let me know what you guys think. You need an 8 injector setup. Then you can retain some at least useable driveability. T76 is a big boy! One question, how are you going to keep the cylinder head from ejecting into the high heavans? Link to comment Share on other sites More sharing options...
heefner Posted September 25, 2005 Report Share Posted September 25, 2005 You need an 8 injector setup. Then you can retain some at least useable driveability. T76 is a big boy! One question' date=' how are you going to keep the cylinder head from ejecting into the high heavans?[/quote'] ARP studs and copper head gasket I hope. You may be able to get away with decent driveability with 100+lb/hr injectors. What size thorttle body do you plan on using. I would think maybe 75mm would be about the largest you would want to go without drastictly affecting off idle acceleration. I hope you plan on o-rinng the block aswell. Link to comment Share on other sites More sharing options...
g54beast Posted September 25, 2005 Author Report Share Posted September 25, 2005 I have arp studs, mains, and rod bolts. I'm holding off on o ringing the block because I'm waiting for the sce titan head gasket. I've seen 50+ lbs on on of those titan gaskets and there is no need to o ring your block. I've race ported my non jv head, 3 angle valve job, back cut, on stainless valves, hd springs and retainers. I have a roller set-up, I will be using Tim's hiya boosta roller cam. I'm still modding a magna tr intake mani with a ford 70mm tb. I was also thinking about also running a dry shot of nos at lower rpm to help me boost and I have a 150 shot of wet nos programmed to spray @ 4000 rpm. All together I should see at least 700 hp. I have wiseco .040 forged pistons, shot peened and hardened rods. Hardened crank, oversized bearings- rods & mains. Total seal rings, and krankvents. Bs has been removed and everything has been balanced. Link to comment Share on other sites More sharing options...
tsiconquest88 Posted September 26, 2005 Report Share Posted September 26, 2005 well with the sce titan head gasket, its not ment for o-ringing at all! thats wut its made for the ability to not need o-ringing and sealant etc. lol, and for your project man, me as well as some other guys used t-70's and other such larger turbo's, im curious to find anyone who went that big and i mean if your going to get 700 i would say u better wait till the sce comes out lol, cus there isnt a gasket made for our car that is going to hold up to nos increase to 700 hp with the boost u are looking to run with that turbo. good luck man sounds like u have some of the best mods to the block at least, and if ur rods dont hold up, i hate to say it TEP (much as i cant stand them), lol has some completely aftermarket peuter forged rods that can hold over 200 hp each, much more than most of us need, but for u i think maybe u should, little pricy though :wink: Link to comment Share on other sites More sharing options...
kev_rm Posted September 26, 2005 Report Share Posted September 26, 2005 why are you using a rrfpr with a stand alone ECU? That will just making tuning hard. Link to comment Share on other sites More sharing options...
g54beast Posted September 26, 2005 Author Report Share Posted September 26, 2005 The rrfpr will increase the fuel pressure as the boost increases. At 50 lbs of boost I would rather go rich if there is a problem and the boost spikes. Went lean once before at high boost, wasn't pretty....it will also give me more fuel when the nos kicks in and the boost starts climbing. Its the added security that I want. It is definitely easier to tune without it but you should still be able to make it work. Link to comment Share on other sites More sharing options...
kev_rm Posted September 26, 2005 Report Share Posted September 26, 2005 Totally unnecessary with a stand alone ECU. Use the top of the fuel bins to force it rich if the boost gets out of control. By the way, just out of curiosity, what ECU and MAP are you using? Link to comment Share on other sites More sharing options...
tsiconquest88 Posted September 26, 2005 Report Share Posted September 26, 2005 yes he is right, u dont want to use a rrfpr for your setup, the tuning maps will allow u to have the pressure u need through all rpm bands with a regular adjustabel fuel regulator. they will be great for your tuning Link to comment Share on other sites More sharing options...
g54beast Posted September 26, 2005 Author Report Share Posted September 26, 2005 Well, if that's the case, It might just be for sale..... I really thought that I would still need it.....I guess I was wrong... I am running the megasquirt 2.2v with a 4 bar map. Should be able to handle 50+ lbs Link to comment Share on other sites More sharing options...
heefner Posted September 26, 2005 Report Share Posted September 26, 2005 With a T76 you may need the 150 shot out of the hole to spool the turbo but I can't see where you will need it on the top end. Although, you may only see 12psi by 4000 rpm with a turbo that size. I don't know much about the SCE gasket but I do know that there aren't many heads that will compare to ours so your not really comparing apples to apples. Link to comment Share on other sites More sharing options...
Boosted_One Posted September 26, 2005 Report Share Posted September 26, 2005 Totally unnecessary with a stand alone ECU. Use the top of the fuel bins to force it rich if the boost gets out of control. Exactamundo! Link to comment Share on other sites More sharing options...
artinist Posted September 26, 2005 Report Share Posted September 26, 2005 that turbo will never boost to 50 psi on this engine in the 1/4 mile even if you got rid of the whole wastgate. Link to comment Share on other sites More sharing options...
Boosted_One Posted September 26, 2005 Report Share Posted September 26, 2005 Hmmm...on the T-76 Art...what if he ran some wicked tail compression to get it going? That is a huuuuuuge turbo though. There isn't a lot of exhaust volume, velocity, bla bla to get fire off a big dog like that....on a 4G54... Link to comment Share on other sites More sharing options...
artinist Posted September 26, 2005 Report Share Posted September 26, 2005 yea with race gas, high compress and nos. mine with the gate shut barely hits 25. i will be switchin to a GT30 or a GT32 very soon. i am looking into the different versions. it gets confusing. Link to comment Share on other sites More sharing options...
FuelinjectionPro Posted September 26, 2005 Report Share Posted September 26, 2005 g54beast, A easy way to find safe injector size need for a 4 cyl, turbocharged is: Injector size in Lbs= HP X .6/ 3.4 Example: For 350HP: Injector size in Lbs= 350HP X .6/ 3.4 =210/3.4 = 61.76 Lb injectors. For 500HP: Injector size in Lbs= 500HP X .6/ 3.4 =300/3.4 = 88.2 Lb injectors. For 700HP: Injector size in Lbs= 700HP X .6/ 3.4 =420/3.4 = 123.5 Lb injectors. We have been able to control 160LB injectors in turbocharged 2.2L engine and have it idle well with our system. It would be nice if you had one of our HURRICANE-8 systems, but since you already have some parts, we would be glad to help anyway we can. The Titan headgasket is coming along well also.Ed Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted September 27, 2005 Report Share Posted September 27, 2005 that turbo will never boost to 50 psi on this engine in the 1/4 mile even if you got rid of the whole wastgate. What about Chauncey? White SQ, T76@54psi.. Ran 9.51@149mph...don't know too much more about his car(nitrous, funny gas etc..?)..Think it was at pamona raceway, late 90's? Link to comment Share on other sites More sharing options...
g54beast Posted September 27, 2005 Author Report Share Posted September 27, 2005 Well I guess the t76 can reach 50+ lbs of boost in the 1/4. Like I said before a lot of research went into this project. Unfortunately I also overlooked some of the smaller details like injector sizes, new fuel lines. Ed- although I have parts I have not ruled out the HURRICANE-8 system. I still might get the mani and injectors. Pm me with a price...... Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted September 27, 2005 Report Share Posted September 27, 2005 Maybe it can, or maybe he was running juice also to spool it faster.. Not too much info about his car is around. Link to comment Share on other sites More sharing options...
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