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Old 01-28-2012, 03:30 AM   #1
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Intake & heads exchanges

Will a 98 3.8L benefit from exchanging to intake and Throttle Body of a 99 or later model, or does it need the heads as well?
Not sure I am clear on where the changes in single port and twin ports take place. I know the heads house different valves, but will the intake of the 99 require the heads to work and/or receive the benefits.
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Old 01-28-2012, 03:55 AM   #2
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Re: Intake & heads exchanges

I think you'll need the heads, cam, intakes, fuel rail adn wiring harness from a 99-04 v6 to complete the split-port swap... but it'll give you a 40 hp boost... could be worth it if you find a donor car
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Old 01-28-2012, 11:41 AM   #3
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Hey bud here is a site to check out tells you everything Ull need in detail well worth the swap.. http://3.7mustang.com/vb/f5/sixpacks...ap-post-95288/

---------- Post added at 11:41 AM ---------- Previous post was at 11:23 AM ----------

Also check out the windstar upper intake its another awesome up grade that will boost HP

http://www.stangnet.com/mustang-foru...d-swap.795471/
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Old 01-28-2012, 05:02 PM   #4
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Thanks.
I am planning some changes, and was really looking at the Power Packs at Super6. I am thinking that I should stick with the 98 Power Pack, and have my cores to exchange. I hadn't thought about all the little mods that may be necessary. I will be in a tight time schedule as it is, when I get ready, and this seems as it will add time to my weekend projects.
The biggest part I liked was it increased available Throttle Body sizes. The 98s are limited to a 65mm, and I wondered as I dialed more horses, was the supercharger going to hit a wall before getting me in the 400 range due to this limitation.
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Old 01-28-2012, 07:00 PM   #5
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Actually got a turbo for mine
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Old 01-28-2012, 08:45 PM   #6
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Are you running on a stock TB? If so, what kind of RWP have you been able to achieve with your turbo, and how much boost are you pushing?
My Vortech is running between 4&8 psi, depending on how much effort I make to keep it in the boost, and I am currently tuned to 200RWH. I have squeezed all I can out of my injectors, so as I plan my build, I really want try to eliminate any choking points, like I read in at least one article, you might as well do it at one time if you can.
Also, I am reading that the factory headers on the 98 are as about a good exhaust manifolds as I am going to get, shy of installing long tube headers. Do you think if I am targeting 400-425 RWH, they will suffice coupled to a divorced duel?
Appreciate all the free advice, just joined you guys about a week ago, and this is the second piece of advice I been helper with.
A last question on this thread, has anyone tried using a Tremec T56, 6spd on a 3.8? I used to have one several years ago on a Formula, and I constantly want that extra gear?
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Old 01-28-2012, 09:03 PM   #7
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How you have you turbo set up?? And that's s very reachable goal.. my turbo will only push out 15 pound of boost its a small one with no lag.. but stock internals will only handle a max of 11 pounds got mine set for 6 pounds
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Old 01-29-2012, 08:00 AM   #8
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Re: Intake & heads exchanges

If you ever get your v6 to 400 RWHP... let me know how!!!

I'm doing an SSM stage 3 heads/cam/intake, and an SSM 4.3 forged stroker, and even if I throw a vortech on after that I wouldn't see 350 RWHP...

But I've read that the stock manifolds will not be any good past 300 BHP.... So maybe try headers if you do any more engine mods...

and 8 psi should get you way past 200RWHP. You probably need much bigger injectors. at least 24#
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*01 Cobra, 4.6L, P&P heads, Stage 3 comp cams, MAC LT headers, O/R Hpipe, Bassani catback exhaust, Too many bolt-ons to list..., 4.30 gears. (364 rwhp/ 330 rwtq)
*01 Roush Stage 2, 4.6L, 5 spd, BBK Bolt-ons (Wife's)
*71 Chevelle, 350, 4 spd, H/C/I, (~400 hp)
*72 C10, 350, Auto, (my Daily Driver)
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Old 01-29-2012, 08:42 AM   #9
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I'm running shorties that basically are the same as the 94-98 factory headers those are shorty headers and been nice to have known before I dropped what I did on mine.. dude there are v6 hitting 600 rwhp with those stroker engines .. yes bigger injectors is a must..
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Old 01-29-2012, 08:48 AM   #10
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Agreed, the stocks are only 14#, so there is no way mathematically to get anything more from them.
My tuner said 300 was a much more realistic number, his Dyno is quite stingy I've been told by other guys who build full blown track cars, however the more I am reading the more I'm gaining confidence.
Tuning a six is new to me, I spent years behind 8's, but had to quit playing for a while as I have three young ones.
So this has been a new spin on things. According to the calculators, it's going to take somewhere around 43-46# injectors to get there, which will definitely need a stronger lower end, and I too am seriously looking at an SSM 4.3 stroker kit for mine as well. Everything cost so dang much these days, you need to build it three times on paper, before you start tearing in. Like in the carpentry industry, measure twice before cutting.
When I do begin the tear down, which may be a while, I will try to photo journal it, as this is a great place to share findings, and I agree 400 is quite optimistic, but I've personally seen guys dial 800+ out of the old Buick GN 3.8, so I do believe anything is achievable, however many of those were so boosted from oversized turbos, they had short life spans, I want something I can drive for a while.
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