12v perforamnce mods

[Sick Boy]

what aftermarket injectors are available for a 89 12valve? Who makes them what would be the horse power ratings? What are some other mods you can do?

thanks

 

[dpuckett]

First, in an 89, (I assume you are intercooler challenged) you do NOT need to go to a hotter injector without some air flow improvements- namely, AN INTERCOOLER, a smaller exhaust housing (16 or 14; stay away from the 12s, unless you have 3. 54s and dual OD), and better flowing air filter (steer clear of the red ones; I'd recommend a BHAF). There is almost as heated a debate as to the efficacy of a 4" exhaust as there is over synthetic oil, but I gained a great deal in spoolup, reduced EGTs, etc, with my 4" system, or what I have of one.



Get a pyrometer, put the probe in the manifold (again, I am starting a war here, as well; I'm on a roll tonite )



Go for 40+ psi boost gauge- mine made 29psi with stock injectors and a slightly tuned pump- with the EDMs, I can hit 38 with the 18hsg.



You can turn up the flow of the pump, but I would get some base readings from the gauges first, you may already be fuelled well enough.



Get a marine head gasket if it is original- it will blow at about 30psi boost, or advancing the timing. BTDT.



Now for injectors:



PODs add 28rwhp @ stock fuelling. I. E. if you are 20% over stock, you will gain 20% more than 28hp, say about 33hp (if I understand correctly), all else being equal, which it almost never is. Run in the neighborhood of $400-450 for a balanced set.



Bully Dog and BD have some 40-50 hp injectors. See their sites or talk to a few members here. I know JLEONARD has the Bully Dogs in his early 91, and is happy with them. Not sure of price off the top of my head, and my dial up is SLOOOWWW tonite; not gonna go all over the net looking.



EDMs/ Extrude honed. My EDMs were $650, exchange, and they go up from there. They put new tips in the EDMs, but need the bodies for cores. Quite a bit pricier, but I think they are the wave of the future, or for 3-5 years, till someone comes up with something better. I remember E. H. being the latest thing... ... The good thing about EDMs is you can have a set designed for you and your HP goals; i. e. custom, literally. I had a set of F1 Mach 1s, and they were too much- I hit 1350 faster than I liked, empty. They wouldnt have worked for me towing, at least without an intercooler. I now have (with some prodding from the guy I bought them through) a set that flows stock rate, but I still gained 5psi peak boost, and lowered EGTs about 50-75 deg across the board over stock.



ANyone feel free to jump in this bandwagon and correct me.



Daniel

 

[sparks57]

Jeeze, somebody is a motormouth!



But anyways, do a search, it is a often overlooked tool that will answer this question with more info than you really want.

 

[JLEONARD]

I know JLEONARD has the Bully Dogs in his early 91, and is happy with them.

Yes I am very happy with them. A good amount of power, a little smoke that I know I could "tune" out, absolutely none at idle, very smooth, and excellent in the mid range.

I bought them "hardly used" at a good price, but I think they are in the $500 range new.

I really need to dyno to see where I am for power, so far my only baseline was 165 rwhp /375 ft-lb . . that was with the K&N filter and 16 cm housing as my only mods.

Since then I have rotated the fuel cone to max, changed to a 4 inch exhaust, installed the Bully Dog +50s (which are +25 for non I/C per BD), and turned the fuel screw one turn.

Every one of these mods was done seperately, and each added 2 to 4 psi of boost. . if that's any indication of " BOMB effectiveness".

My 30 psi boost gage bottoms so quickly now I need to upgrade.

Right now I have NO plans of adding an intercooler..... my EGTs are well under control, probably because I don't tow anything, and only haul lightly ... this is my daily driver/commuter, and right now it has a decent amount of power, is fun to drive, and still gets 24 mpg daily (well, it can when my foot is light).

I am however, considering a turbo upgrade in the form of a hybrid... details still confidential at this time... .

Good luck and if you have any questions feel free to ask.

Jay

 

[bgilbert]

Go with the POD's and you will be happy. Definately do NOT buy a 30 psi boost guage! Before injectors and mods, I was hitting 22 psi stock fuel settings. After inj's, mods to fuel system, waaahooo the little 30 psi guage is screaming, pegs about 1/2-3/4 throttle. Boost and pyro guages at the minimum. Read TDR issue 42 page 30 on Bob's scripts for power. Describes the order of bombing or performance mods to 1st gens. A turbo upgrade would be nice, hx35, or hx40. Good luck. Bill and oh yeah stacks would also be nice.

 

[BushWakr - RIP]

Ahhhhhh fer pete's sake... the ONLY time stacks are good is if they are made of pancakes... . geezzz... . you kids...



pb.

 

[Greenleaf]

Ahhhhhh fer pete's sake... the ONLY time stacks are good is if they are made of...

... and the fact you gotta rush outside from a sit down at Pizza Hut to cover yer stacks when a thunder shower opens up overhead



-S

 

[JLEONARD]

cover yer stacks when a thunder shower opens up overhead

Don't you have to ground those things too? They stand up there saying "strike me!!"



Scott... . Or is that only when they take those funny pills? :-laf :-laf

Jay

 

[Greenleaf]

Funny Pills

... ... funny pills... ... ... funny pills

Funny pills... ... funn..... oh... . Oh!... .....



The ... "FUNNY PILLS"!!!!!... Gotcha!:-laf



I wonder if PB could use... ..... oh, never mind

 

[dpuckett]

"and still gets 24 mpg daily"



Geez, rub it in, why dontcha? What happened to the 21-22 I WAS getting? (Hey, I have 4. 10s and a dually, coupled with CITY driving) Hmmm... ..... hafta search for that extra 4 mpg now. Maybe moving back home will allow me to find it. If not, my pump may need a little massaging from PDR or some similar facility. What do those run, Pastor? I'll have to send ya a PM about that.



CB- I was assuming he HAD done a search. Sometimes if you dont type in just the right words, you dont get much. Not ALL of us have Fingers of Fury. BEsides, I like to be clear in my orations.



-DP

 

[CGauthier]

I always learn from reading dpucketts posts, so keep up the typing dude



Dam, 24 miles to the US gallon? Dam, i got 20 Cad (approx 17 US) on the highway the other weekend, I was a little disappointed. I figgur the first step should be to ditch the K&N, i looked in there and it didnt look pretty. Just gotta mark some of these p/#'s down and hope that i can get one out here; i dont wana wait for it to come to me by ordering online. Any recommendations that may be readily available would be mucho appreciated..... also by the time ill be able to start really bombing it'll probably be time for another a/f; so im wondering if i should just put in a stocker or will help to put in a bhaf ?



TIA,

Carl G



Sorry about the hijacking.....

 

[bgilbert]

Yes run a BHAF now. BHAF fleetguard pn AH19037. Napa BHAF pn 2790. Stocker air filter probly costs about the same as a BHAF. The fleetguard bhaf should be around $40. Napa $40-50. On the fleetguard a/f you might try a Cummins shop or other diesel related shop, big rig shop if they will order one. Bill

 

[JSchlachta]

Does anyone have a picture of the BHAF fleetguard pn AH19037. Also do you just replace the platic housing part that is stock and replace with the disposable housing from fleetgaurd?



Looks like a good uprade from the stock setup. Right now running K&N filter but would like to get a larger filter.

:--)

 

[Paychk]

Originally posted by CB_Parker

But anyways, do a search, it is a often overlooked tool that will answer this question with more info than you really want.

Sooooo



The shoe is on the other foot now and you won't even take the time to return the favor?



I see how it is now, so turn about is fair play???



Then the next question you post I can throw this quote back to ya right???

 

[JLEONARD]

Also do you just replace the platic housing part that is stock and replace with the disposable housing from fleetgaurd?

You get rid of the stock filter housing. Clamp the intake hose over the neck of the BHAF, and lay it on the fenderwell. Some guys will use a small sheet metal screw (or 2) to secure the hose to the filter neck so it cannot slip off.

Some also make a bent sheet metal piece to block the hot air from the turbo/manifold from getting the the BHAF and to act as a base to bolt to the fender well.

I just set up my son's 94 with a BHAF, sheet metal deflector, and we secured the filter to the sheet metal base with a large tie wrap so it won't bounce around.

Jay

 

[CGauthier]

Thanks Bill, You da man

 

[dpuckett]

SCrews in the neck of the BHAF is a good idea. I have mine caulked something fierce right now; It seems to be doing a better job than the K&N, which aint giving my baby BHAF any credit.



I'll also second putting something in the way to block the hot air off the fan- hot air has less O2 per volume; hence, less MPGs, and hotter EGTs. I have some thick cardboard in there, now. Or I did the other day... ...



Paychk- go easy on the kid. He's excitable, and we dont want him going off like a grenade. Just kidding ya, CB You're alright, even if you think every noise means your pickup is coming apart. Drive mine a mile, and yours should seem like a Rolls, or at least a Mercedes.



-DP

 

[Paychk]

Originally posted by dpuckett

Paychk- go easy on the kid. He's excitable, and we dont want him going off like a grenade. Just kidding ya, CB You're alright, even if you think every noise means your pickup is coming apart. Drive mine a mile, and yours should seem like a Rolls, or at least a Mercedes.



-DP

Cando!

 

[cerberusiam]

I have mine caulked something fierce right now

Would that be siliconized or non-siliconized caulk?



Daniel have you been living in your truck and mistook it for your house?



How many times do I have to tell you bubble gum and baling wire are the preferred materials.





A bit more permanent and reliable fix would be a piece of 4" exhaust pipe to fit inside the neck of the BHAF and keep it from collapsing when you tighten the clamp.



As far as hot air getting to the filter, why bother? Once the truck is rolling the amount air flowing thru radiator, grill, headlight buckets, etc is going to move any heat away from the air filter anyway. You might get a partial charge of warm air if you wood it from a dead stop but by the time the boost builds you should have sufficient outside air flow. What is needed is more outside air flow thru the engine compartment to address the underhood temps.