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Tractor Pulling Discussion Forum

4430 performance upgrades

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Bill Ross

10-28-2004 13:03:21

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Looking to increase the HP of my 404. I have a 4840 turbo and the A pump turned all the way up for pulling and then turned down at the end of the season. Currently shows 245 HP on the dyno. Would like advise on taking it higher without a swap to a 466 since I have two complete 404's and not ready to spend the extra yet for a 466. I am guessing I should O ring the head to prevent blowing a head gasket and have the pump sent out to increase output on it as it seems to have plenty of air. any ideas? maybe bigger injectors?

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K.B.-826

10-29-2004 20:02:18

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Re: 4430 performance upgrades in reply to Bill Ross, 10-28-2004 13:03:21

An aftercooler would make a noticable difference.

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buickanddeere

10-29-2004 07:30:56

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Re: 4430 performance upgrades in reply to Bill Ross, 10-28-2004 13:03:21

The 55 and later series head has superior ports and manifolds. To prevent engine failure at these power levels water injection will be required. If EGT goes over 1500F your engine/turbo are on borrowed time. Are you measuring the temps now?

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4430deere

10-29-2004 06:03:32

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Re: 4430 performance upgrades in reply to Bill Ross, 10-28-2004 13:03:21

you are in pretty good shape take the 4840 turbo off and go with something bigger. my 4430 dynos at 270 with stock turbo, set the timing up just a bit if you can run an electric fuel pump to help keep the injection pump primed when wot. there are lots of other tricks also.

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Bill Ross

10-29-2004 09:17:19

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Re: 4430 performance upgrades in reply to 4430deere, 10-29-2004 06:03:32

Thanks for the response. I do have a Holly electric pump in front of my primer pump. I take the inner air filter off to pull and leave the outer one on. Are you saying I will get more power with the stock turbo than the 4840 turbo? I do not monitor Exhaust gas temps, should I? Also who should i send my "A" pump to in order to get more fule from it. Our 4630 makes 320 HP with the same set 4840 turbo but it has the intercooler and the A pump puts more out I think.

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4430deere

10-29-2004 10:02:24

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Re: 4430 performance upgrades in reply to Bill Ross, 10-29-2004 09:17:19

on my tractor i took the breather completley off, ran it like that for a while but i put a k&n right on the end of the intake tube, no i am not saying that you will give more power out of the stock turbo but there are better ones out there. what turbo is it that you have off of the 4840, if you want to stay simple and not spend alot of money go with bigger injectors and lines, this will make a big differance, most definately put a egt gauge on your tractor as well as a boost gauge, buy this you can tell what makes a differance. you could also change cams. the sky is the limit, the only limit is your wallet, what class are you running-check the rules before you get to crazy.

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Bill Ross

10-29-2004 13:18:09

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Re: 4430 performance upgrades in reply to 4430deere, 10-29-2004 10:02:24

I have a true 4840 turbo I got from a puller down south. It's a garret. he said to be careful cause some folks say "one size fits all" on those turbos and he was sure I was actually getting a 4840 turbo and not a 4440 or something. I run around 30 psi boost and appear to have plenty of air. Fuel seems to be holding me back now. I do have a boost gauge but no EGT gauge. there really is no classes out here yet. Basically as long as it appears stock you are OK. Some pulls use a pace tractor, others have a dyno and hold your power down, some only measure hitch and weight and away you go.

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Redman

10-30-2004 12:34:29

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Re: 4430 performance upgrades in reply to Bill Ross, 10-29-2004 13:18:09

i think i would look into head work,a little porting would do wonders.
with the turbo you are running you shouldn't get that much boost til aroung 4000 rpm.
midwest diesel injection is a good pump and injector place with fair prices,they are in Ft Dodge IA.
if you call,ask for Lee.

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G-MAN

10-29-2004 16:57:33

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Re: 4430 performance upgrades in reply to Bill Ross, 10-29-2004 13:18:09

A turbo meant for a bigger engine doesn't necessarily mean more horsepower. Turbos are generally sized to the displacement, boost level etc of the engine they were designed for. A bigger turbo takes longer to spin up and makes for more "turbo lag". A smaller engine also might not have enough exhaust volume to drive it fast enough to make more boost than a smaller turbo sized to fit the engine. If you're worried about head-gasket sealing, as you should be with a 6404 making 300 flywheel horsepower, you'd be advised to pull the head and check liner protrusion, deck flatness and head straightness and make repairs accordingly. Go back with a new head gasket and the new torque-turn head bolts following the latest and greatest torque sequence. I know you're geared toward running the 404s, but a 55-series motor would sure give you a bunch more potential and strength.

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4430deere

10-29-2004 06:05:39

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Re: 4430 performance upgrades in reply to 4430deere, 10-29-2004 06:03:32

as for o ringing the head untill you start running 60-70 psi of boost its a waste of money, or untill you blow a head gasket. jmo

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ANON

10-28-2004 16:27:07

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Re: 4430 performance upgrades in reply to Bill Ross, 10-28-2004 13:03:21

I have heard you can put 50 or 55 series injectors in and get a big boost in power but I don't remember if they said they changed to a 50 or 55 series head.

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Big Pipe

10-29-2004 23:23:56

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Re: 4430 performance upgrades in reply to ANON, 10-28-2004 16:27:07

Will a 55 series head fit on a 404?

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ANON

10-30-2004 15:30:31

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Re: 4430 performance upgrades in reply to Big Pipe, 10-29-2004 23:23:56

It was 2 years ago that I talked to the guy and I think that is what he said he did. I don't know for sure or if he was blowing smoke.....

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