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Engine Nut
04-20-2005, 01:33 PM
The attached is something that some of you might find useful. It contains Tune-up and Timing procedures for Indmar Marinized Ford and GM engines through the 2005 Model Year. I hope thr PDF attachment works. This is the first time I have tried making an attachment.

André
04-20-2005, 01:40 PM
:worthy: :worthy: :worthy:

east tx skier
04-20-2005, 01:42 PM
Rock on, ENut!

Wes
05-15-2005, 03:01 PM
Thanks EngineNut

I needed that...just have to fiqure out if my 93 Prostar 351 (285 HP) is considered standard or HO.

Wes

JimN
05-15-2005, 03:08 PM
I believe the 285 HP is the HO version.

Engine Nut- does Monty still work at Indmar? I had heard Matt left a couple of years ago, but have seen his handle on a couple of sites.

Wes
05-15-2005, 03:11 PM
Thanks Jim,

Appreciate that


Wes

Engine Nut
05-15-2005, 04:58 PM
Thanks EngineNut

I needed that...just have to fiqure out if my 93 Prostar 351 (285 HP) is considered standard or HO.

Wes
The 285 is the HighOutput engine ... GT40 Heads and a higher performing cam and pistons.

Engine nut

jimmer2880
05-16-2005, 09:09 AM
:D :worthy:

THANK YOU!

jimmer2880
05-16-2005, 09:17 AM
I'm cornfused....

In an earlier post - you stated:

"The switch over to GM Vortec heads came back in 95-96 model year era. The vortec heads allowed the engines to breathe more efficiently and resulted in a HP increase of approximately 40 HP. For example, the original Indmar TBI was approximately 275 HP, when the Vortec model came out, the HP bumped to closer to 315. You can easily tell if you have Vortec heads on a 5.7 by looking at the bolts that hold the intake manifold to the cylinder head. On a Vortec engine, there are 8 intake manifold bolts that go straight down into the head. A non-vortec engine has 12 intake manifold bolts that go in at an angle. "

Yesterday, I counted my intake bolts on my '95 PS190, Elect ignition (not a points convert either). I counted 12, meaning that i'm non-Vortec. However, your .pdf only states Vortec for any 5.7 that's electronic non-LT1.

Is there another way to tell if I'm Vortec or not? I'm starting to think I'm using shorter plugs than I should be?

Evan Jones
05-16-2005, 09:28 AM
I think I'm in the same boat. My '97 is a 275 HP non- HO electronic ignition, non-vortec...I think. I ordered new plugs from MYMC and they sent me the long ones, luckily I checked them against the ones I pulled out which were much shorter.

The only optional engine that year was the LT-1.

Engine Nut
05-16-2005, 11:47 AM
If you have 12 bolts holding the intake down, you have a non-vortec engine which needs MR43T Spark plugs... the short reach plugs.

Engine Nut

jimmer2880
05-16-2005, 02:28 PM
If you have 12 bolts holding the intake down, you have a non-vortec engine which needs MR43T Spark plugs... the short reach plugs.

Engine Nut

Ok - thanks. Guess I'll add another row to the chart for a 5.7 Non-Vortec, Elec ignition. :)

Engine Nut
05-16-2005, 02:37 PM
I have posted a corrected chart that you can download. sorry for the mistake.

Engine Nut

Wes
05-16-2005, 07:53 PM
Thanks EngineNut, just finished putting the correct plugs in.

jimmer2880
05-17-2005, 06:42 AM
I have posted a corrected chart that you can download. sorry for the mistake.

Engine Nut

Thanks again! :worthy:

sinister_designs
12-19-2007, 06:25 AM
does anyone still have this pdf file?

Engine Nut
12-19-2007, 08:22 AM
does anyone still have this pdf file?

Here it is.

Engine Nut

drbesvold1
12-19-2007, 11:52 AM
Here it is.

Engine Nut engine nut whats the diffrence between the 351 standard and high ?

Engine Nut
12-19-2007, 12:10 PM
engine nut whats the diffrence between the 351 standard and high ?

The standard engine was about 240 or 250 HP and the HO was 285. The HO had different cylinder heads (GT40 Heads) a different cam and different pistons. The spark plugs for the standard engine are short reach plugs and HO used long reach plugs.

DooSPX
12-19-2007, 03:01 PM
The standard engine was about 240 or 250 HP and the HO was 285. The HO had different cylinder heads (GT40 Heads) a different cam and different pistons. The spark plugs for the standard engine are short reach plugs and HO used long reach plugs.

are you sure the camshaft and slugs are different on the H.O. 285HP models? If so, what is the cam spec's on the H.O. and what is the difference in pistons? The pistons so all be either cast or hyper., so the only difference I can think of would be either flat top, dished or domed?

Engine Nut
12-19-2007, 03:26 PM
are you sure the camshaft and slugs are different on the H.O. 285HP models? If so, what is the cam spec's on the H.O. and what is the difference in pistons? The pistons so all be either cast or hyper., so the only difference I can think of would be either flat top, dished or domed?

The cam and pistons for the HO engine and standard engines have different part numbers. I am not sure about the specs but apparently the HO has a higher lift cam and the pistons were different so the valves would not impact the pistons ... so says one of our engineers who was around during the Ford days. The Ford P/N for the cam is F1JE-6250-BA and the pistons are F1JE-6108-AA. You might be able to get the specs from Ford.

DooSPX
12-19-2007, 05:19 PM
thank you Engine Nut.
I have never heard of PTV issues with swapping the GT40's or the P's over on a standard 351. PTV clearances should only come into play with a cut deck, or extreamly thin gaskets.
If the slugs are indeed different, I would bet that the only difference is the pistons have valve relief's cut into them.
The camshaft being higher lift, that may be true, but not sure. Im pretty sure that the standard 240/250 HP 351W's were a marine version of the heavy duty truck motor that Ford Racing still sells to this day. its a 351W 250HP 340TRQ or something to that effect.
Ford Racing has the actual spec's on there website somewhere.

of course, I could be incorrect as well. it happens sometimes. LOL
I guess only the Ford team would know for sure.

Engine Nut
12-19-2007, 06:08 PM
The way I understand it, and I am not a Ford expert or even a Ford fan, that you can put the GT40 heads on a standard 351 with no problem. There will be some benefit in performance but it will not be the same as the HO engine. To make it the HO engine, the pistons and cam also need to be changed. I checked the part numbers and the pistons and cam on the HO engine are different than the standard engine. They had stopped building Fords by the time I started working at Indmar so all of this information is hearsay from one of our engineering techs who had some involvement with the Ford product.

thank you Engine Nut.
I have never heard of PTV issues with swapping the GT40's or the P's over on a standard 351. PTV clearances should only come into play with a cut deck, or extreamly thin gaskets.
If the slugs are indeed different, I would bet that the only difference is the pistons have valve relief's cut into them.
The camshaft being higher lift, that may be true, but not sure. Im pretty sure that the standard 240/250 HP 351W's were a marine version of the heavy duty truck motor that Ford Racing still sells to this day. its a 351W 250HP 340TRQ or something to that effect.
Ford Racing has the actual spec's on there website somewhere.

of course, I could be incorrect as well. it happens sometimes. LOL
I guess only the Ford team would know for sure.

DooSPX
12-20-2007, 06:01 PM
Thats interesting about the cam and pistons.... I cam I can see, a little more lift, a little more air flow, a little more HP to make the 45 needed.
but, I still have no clue why the pistons are different...

KHall
12-20-2007, 06:06 PM
Different pistions are probably different dome shape for "airflow" or maybe just slightly different compression. Likely they were still conservative on compression being a boat motor.

DooSPX
12-20-2007, 06:33 PM
that is true... I believe the HO and the 240 had the same CR. I could be wrong though.