Cyclozene Posted December 2, 2011 Share Posted December 2, 2011 I was talking to a tuner the other day about injectors. I was originally going to pick up 740cc injectors but when i told him i was going to run e85, he said i should go bigger. I went with 840cc injectors but I am wondering if they are too small now. I heard that anything bigger than 840 and I will have idle issues. Can anyone shed some light on this. Thanks Link to comment Share on other sites More sharing options...
LosAngelesLGT Posted December 2, 2011 Share Posted December 2, 2011 I like forum SEARCH function injections personally. http://legacygt.com/forums/showthread.php/injector-recommendations-based-drivability-tuning-174329.html Link to comment Share on other sites More sharing options...
sumfoo1 Posted December 2, 2011 Share Posted December 2, 2011 ~350/400whp on e85 says most tuners I've talked to Link to comment Share on other sites More sharing options...
CasopoliS Posted December 2, 2011 Share Posted December 2, 2011 Need more info on your setup. You can get a lot of power out of 840... but with the correct setup (we are talking stage III), you can max those out on E85. Just depends on the setup and power you are trying to achieve. Link to comment Share on other sites More sharing options...
Spec B Posted December 2, 2011 Share Posted December 2, 2011 For reference - I am close to maxing out my 850s on my E85 - HTA68 setup - 95% IDC. On pump I would probably be around 75-80%. Link to comment Share on other sites More sharing options...
sumfoo1 Posted December 2, 2011 Share Posted December 2, 2011 ^ how much power!?!?! Link to comment Share on other sites More sharing options...
Cyclozene Posted December 2, 2011 Author Share Posted December 2, 2011 Well, here is what i have and am going to install. I have a walbro 255 FP. An FP HTA68 sti outlet not lgt. I have a hayden 67 model transcooler. JECS 840cc injects. A GS ebcs. Im debating where I want to do sti manifold w/tgv deletes and tmic or pick up a decent fmic. But to answer your questions, it is AT so does around 350 sound too much? Link to comment Share on other sites More sharing options...
sumfoo1 Posted December 2, 2011 Share Posted December 2, 2011 Sounds like fun to be honest... can't wait to get everything together to do run my 20g up some... i'm going to have to install it and keep it turned down till i get intercooler money. Link to comment Share on other sites More sharing options...
CasopoliS Posted December 2, 2011 Share Posted December 2, 2011 Well, here is what i have and am going to install. I have a walbro 255 FP. An FP HTA68 sti outlet not lgt. I have a hayden 67 model transcooler. JECS 840cc injects. A GS ebcs. Im debating where I want to do sti manifold w/tgv deletes and tmic or pick up a decent fmic. But to answer your questions, it is AT so does around 350 sound too much? Get an FMIC. Much easier. Just tune until you get close to injector max. You might hit your injector limit before you hit your other limits, who knows... but just keep an eye on IDC and don't overdue it. Your tranny will be happy if your injectors are limiting you! Link to comment Share on other sites More sharing options...
Spec B Posted December 2, 2011 Share Posted December 2, 2011 ^ how much power!?!?! Depends on the weather - but usually between 360-380 WHP/ 400+ Wtq according to virtual dyno. The numbers really mean very little alone - but my baseline VF43 best run on 93 octane topped out at 305-310 whp. HTA logs attached (I consistantly use the same logging road): romraiderlog_20111106_085459.csv romraiderlog_20111106_103119.csv romraiderlog_20111106_141735.csv Link to comment Share on other sites More sharing options...
Cyclozene Posted December 2, 2011 Author Share Posted December 2, 2011 I plan on doing the hexmods vb upgrade in the future. What would be a safe limit for the 5eat for now Link to comment Share on other sites More sharing options...
LosAngelesLGT Posted December 3, 2011 Share Posted December 3, 2011 ~350/400whp on e85 says most tuners I've talked to You are making a HP estimate based on injector size Get an FMIC. Much easier. Depends on the weather - but usually between 360-380 WHP/ 400+ Wtq according to virtual dyno. The numbers really mean very little alone - but my baseline VF43 best run on 93 octane topped out at 305-310 whp. This is consistant with my experience and numbers. (stage 3.5, vf39, e85, dw's, wb255, e85, fmic, 360/425) Link to comment Share on other sites More sharing options...
Cyclozene Posted December 3, 2011 Author Share Posted December 3, 2011 This is consistant with my experience and numbers. (stage 3.5, vf39, e85, dw's, wb255, e85, fmic, 360/425) Is this with a 5EAT. I would think that would be way too much Link to comment Share on other sites More sharing options...
sumfoo1 Posted December 4, 2011 Share Posted December 4, 2011 You are making a HP estimate based on injector size i was merely saying those are the estimated hp levels tuners will tell you 850s will max at with e85 Link to comment Share on other sites More sharing options...
Cyclozene Posted December 6, 2011 Author Share Posted December 6, 2011 Is it common to max out the 850s with E85? It is seeming more apparent i should have gone with 1000s. I have also read about idle issues with those. Link to comment Share on other sites More sharing options...
PutnamCO Posted December 6, 2011 Share Posted December 6, 2011 I have have a BNR68hta running E85 with 850s and saw peak IDC's of 82%. However, I am at 5300 feet. Link to comment Share on other sites More sharing options...
itsme Posted December 6, 2011 Share Posted December 6, 2011 Is it common to max out the 850s with E85? It is seeming more apparent i should have gone with 1000s. I have also read about idle issues with those. I think you will be fine with 840. I have 830 with my 20g on e85 and I max out in the low 90%idc but, I'm only running 20psi. Plus if you have an auto you don't want to kill your tranny. Trust me if you get close to max out the 840 on e85 you will be going very fast. So try that first before you spend more money on injectors. Racer X FMIC for '05-'09 LGTs, '08+ WRX and '10+ LGT,'14+ FXT, and '15+ WRX TMIC Racerxengineering.com Link to comment Share on other sites More sharing options...
itsme Posted December 6, 2011 Share Posted December 6, 2011 Is this with a 5EAT. I would think that would be way too much Max has a 5mt. Auto whp numbers normally lower than 5mt. Racer X FMIC for '05-'09 LGTs, '08+ WRX and '10+ LGT,'14+ FXT, and '15+ WRX TMIC Racerxengineering.com Link to comment Share on other sites More sharing options...
NSFW Posted December 6, 2011 Share Posted December 6, 2011 Is it common to max out the 850s with E85? It is seeming more apparent i should have gone with 1000s. I have also read about idle issues with those. If you have a big enough turbo, they will become a bottleneck. But that's true no matter which injector you choose. You might have an easier time making this decision if you choose a power goal (or a turbo, if you prefer) and then figure out what parts you'll need to reach that goal (or make full use of that turbo). If you don't know how much power you want to make, we can't help you make decisions about injectors or anything else. There was a time when big injectors meant crappy idle, but that's kind of out-dated. ID 1000s for example will idle perfectly, and they're probably not the only ones (they actually flow more like 900, but still - there was a time when people were excited to get a stable idle with 740s). Link to comment Share on other sites More sharing options...
Cyclozene Posted December 7, 2011 Author Share Posted December 7, 2011 Alright this is good knowledge to know! I will keep the 840s and see how well I like it and in the future if i decide to go 1000s, its good to know there arent many problem! Link to comment Share on other sites More sharing options...
blk mk8 Posted December 7, 2011 Share Posted December 7, 2011 i have seen cars with 2000s idle perfect, alot of it is with the tune and what brand of injectors. i would see what you end up with power wise but 84's are going to get you pretty far. Link to comment Share on other sites More sharing options...
Cyclozene Posted December 8, 2011 Author Share Posted December 8, 2011 Thanks for all the input, i will be doing a write up once the car is done....ish! Link to comment Share on other sites More sharing options...
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