I replaced my stock injectors at 110,000 miles on my 1992 lt1. This engine was idleing rough and also seemed to be running hotter than normally. I spoke to Jon and he told me over the phone how to test my injectors when engine was hot. Sure enough I had a couple of injectors acting up. Jon was offering a great price for his bosch III's that were tested and flow matched . Now my LT1 runs smooth and a little cooler. Engine performance definitely picked up now that its running on all 8 cylinders again and he said that these bosch III can handle ethanol and my multitecs could not. Jon is great to work with and he definitely knows his stuff about injectors. I would buy these injectors again from Jon when needed !

 

I bought a set from jon at fic about a year ago, not sure I could do the job myself, jon convinced me I can, I called him on Sunday morning, he called me back in less than an hour and said he would walk me through it. I called him 5 times that day and he told me what to do. That car runs so good. Starts right up, 26mph and can lite up the tires I can't say enough. I am on the guru site and lurke here.

 

I have FIC's B3-30# injectors in my 96 and have no issues.

 

Bosch III's are one of the best additions to my LT1 engine, how do I know? Well let's just say... i'm going to need rear tires soon....

 

I have used these injectors many, MANY times in my shop

and they are AWESOME! Performance ALWAYS improves and they

are not ruined by the Ethanol in today's fuel like the stock ones were.

They are an awesome upgrade for any vehicle that used the old GM

injectors.

Stay TUNED!
Chuck CoW

 

jon at fic injectors is a great guy, even called me while I was installing them at like 9 oclock at night and asked me how the install was going and gave some pointers on pulling them off (its been a while I forgot how).

 

On the TPI motors, was there ever a reason cited for the high BLMs on new injectors?
Not just B3's, but all brands from what I rememeber.

 

Your question was answered by Dave Dahlgren about 1 year ago now.
He knows his stuff about EFI & engines.
He has been busy & away from C4.
Him & I still chat sometimes.

 

Can you provide a link, or sticky .

 

In a nut shell...

What many don't seem to understand is that the injectors being made by Bosch/ford are designed for the newer OEM cars. New model cars have noticeable differences in design including valve angle, distance from the injector to the valve, inj. angle and so forth. Because the OEM mfgs. purchase in such bulk that dictates what is being produced, and why the ev-1 (design I) has been discontinued. This is why some that are using the new style inj. have cars that will run either rich or lean when using various sizes that have the same lb rating as the original stock inj.

The new style injectors were made for various specific OEM newer applications that require fuel mass delivery to be different (this includes spray pattern). All injector styles deliver the fuel mass in g. and milla seconds differently when comparing the same size inj. (earlier style ev1 and new style ev4/6 design III). This is noticeable under 7ms. and less than .02 g fuel mass. This can be done by plotting the fuel mass vs. ms. and doing a side to side comparison of two injectors (an ev1 and a ev4/6) of the same lb. rating. This is where fuel delivery differences can be seen. Once above the are of .02 g f.mass and approx. 7-8 ms. they both will be similar (ex. a 24 ev-1 compared to a new style ev4/6 24) in the way they deliver fuel. However it is the area below that represents normal street driving under approx.2400rpm medium load value.

Bosch has always made a great product, and the new Bosch can be made to work properly. When tuning, the new style ev4/6 are not as universal when changing sizes (lb. rating) as the older ev-1, and will require additional effort when tuning (not just changing the unj. constant and offsets in the tune) and typically require global changes.

 

I've had 3 sets. The first was stock for my LT1 (24 PPH I think). Then when I added Advanced Inductiuon heads and cam, I stepped up to a 31 PPH injector to get the duty cycles back to ~80%. Now that I am stroking and supercharging, I am installing a set of 63 PPH injectors with meth injection. The first 2 sets ran great and I wouldn't expect anything less from the next set I am installing.

 

i installed the Bosche III 22lbs in my 19990. Idle is definetly better. When I start the car now I just hold the key on until the fuel pump stops priming and the car starts right up. before the swap I had the multecs which started right up but the idle wasnt as good. I replaced the fuel pump and regulator trying to solve the start up issue and have now just accepted that I need to prime the pump before cranking and life is good. for the cost of parts I say A+++ and will buy again If i need another set

 

One thing I cannot tell from all these threads is a tune needed or not to put them in a stock car.

 

I bought new Trickflow injectors. Call them Accell if you like but the specs are different. I read about problems with rebuilt injector high failure rates. I am not referring to a post about FIC just rebuilt injectors in general. I guess the quality control is not great with some re-builders. I also read in this forum and a Camaro forum about problems trying to tune the Bosch 3. So for me the rebuilts were not even considered.

I posted that I was installing a superam and new injectors. A few forum members suggested I call FIC. When I posted that I refused to buy rebuilts I got several negative comments. Jon offered me a set of rebuilts for free. I still went with the new Trickflows. I have no regrets. Most members couldn't understand why I wouldn't accept free Bosch 3s. The guy that tuned my Vette is very knowledgeable professional and said I would have issues with the Bosch 3s. He worked with them in the past. He suggested the OEMs or the 24 lb. Trickflows. I have never had an issue with the injectors. I realize i could have saved some money but I am more concerned with reliability. It's been fine now for years.

I would like to add that I have nothing negative to say about FIC. I understand that Jon will replace any bad injectors, give advice and I'm sure he would return any money to any unsatisfied customer.

 

95% of the bosch 3 sales have been just put it with the stock tune.

 

fred.. just to bring too your attention.. This was almost 4 years ago!!! Your post reads like it was yesterday. When you asked your tuner, no one really worked with these because we were the only ones selling them for the c4 back then, so, of course he is going to recommend something that he tuned before and put down other suggestions. You can buy NEW bosch 3's from us. plus You can buy NEW Accell, SMP, SIEMENS DEKA, DENSO, BOSCH, MAGNETTI, MORAN, NIZMO and FORD RACING injectors from us.We price match gurantee, plus new injectors we warranty for 3 years. Summit, Jegs and 90% of the sellers will not take an injector back. Rebuilt injectors represent a small part of our business. The best thing about the rebuilt is that they are flow matched and will last as long as you own your car. We are changing our warranty to LIFETIME. I don't think in 5 years we have had more than a handfull of returns. Most returns are new products with defects because they are not tested before the customer gets them. If you order a flow matched NEW set we will flow them and match sets for the buyer. This poll thread was put up to determine if the Bosch 3 is a good choice for the c4 community, we urge anyone that has a negative experience to post what the problem was so we can determine if there is a better alternative for that customer. This thread is NOT for your personal comments on your exprerience with other injectors other than the Bosch 3. We don't want another runaway thread!!! Altough, if you want you can put up a poll on how TRICK FLOW injectors work in the c4.

 

Extended cold start up times.
BLM issues from over fueling as compared to stock setup.
Doesn't apprear to be an exact drop in replacement for all years/apllications - seems to require tuning modifications as listed in the above posts.

 

Mine starts right up it's a 90, for 169 I got a whole set of injectors, the car never ran so well and my sop hp is way better. I could care less that the blm is higher than with the multecs that went bad, they cost over 150 each, fat chance I would buy those!!! My car has 145,000 miles on it. I am enjoying it for the first time. A higher blm only means the computer is adding fuel don't it? It's all a math formula and between the o2 and other sensors it will work just fine. Jmo

 

One of the options of this poll is: Didn't solve my problems. I found where the B3's were a bad option. For me that fits and my tuner did work with Bosch 3s. Also I did say that I installed the Trickflow over 3 years ago. (see above) "It's been fine now for years". If you had told me that you are an authorized Bosh dealer and you offered me a set at a reasonable price I would have bought them. For some reason you only offered rebuilts.

 

ok Fred