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Thread: '04 SRT-4 engine in an '88 Caravan build

  1. #741
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by Force Fed Mopar View Post
    Weird, I had no issues with my awic. Although, I will admit I didn't log any temps, nor did I run at the track much, or race during the day. Most of what I did was done riding around on Friday and Saturday nights
    I didn't have any issues with mine either, until I went to the track.

    Quote Originally Posted by csxtra View Post
    I used to have the Frozenboost Type 3 (4.5"x4.5"x10 core) in my CSX, with the type 101 (7" high x 3.5" thick) heat exchanger and about 3-4 gallons of capacity. At around 30psi on a GT3040 I was getting 120-125degF temp drop but around 3psi of pressure drop, and 125degF intake temps (measured using type K thermocouples on a cool day with 85degF water temps).

    I replaced the Frozenboost I/C with a custom A/W IC with a Bell core (6" x 5.3" x 12"), and on a 90 degree day in Memphis with about 25psi of boost and saw over 200 degF temperature drops and 140degF intake temps even with 126degF water temps. Unfortunately my pressure sensors have not been working so I haven't been able to log pressure drops yet.

    Just some data points, but the larger Bell core cools SIGNIFICANTLY better than the Frozenboost cooler did.
    I had the F.B. type 3 IC too and the type 117 (12"X12"X2") heat exchanger. I figured my IC was too small but to fit a lager IC it would have taken way to much re-engineering to make it work and even then it would have been a guess. With an air to air it took probably the same amount of re-engineering (spent 50-60 hours one week on it) but also freed up a lot of space in my engine compartment. Plus the air to air is proven so I went that route.

  2. #742
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Dyno'd my van today, 386 hp and 480 ft/lbs of torque. Ambient air temp was 93*. Max MAT was 168*. Last time I dynoíd it with the AWIC I netted 360/460 and ambient air temp was high 70's. At the track with my old AWIC my MAT was 200* and ambient was mid 70's. I want a 40hp increase with the air to air IC and my new intake plenum. Half way there.

    Click image for larger version. 

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    Last edited by A.J.; 06-14-2018 at 06:16 PM.

  3. #743
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Good stuff! That van is really going to haul the groceries!

  4. #744
    Slugmobile & MeanMini Caretaker Turbo Mopar Contributor wheming's Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    That's great A.J.!
    Nice numbers.
    Wayne H.

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  5. #745
    Supporting Member Turbo Mopar Contributor Ondonti's Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Nice to see the old reliable A to A pay off. Hope the intake manifold works out better than the last few struggles.
    Brent
    GREAT DEPRESSION RACING
    1992 Duster 3.0 The Junkyard- Now - Megasquirt II/Extra. OEM 10:1 3.0 n/a.
    - Old - 11.5@125 22psi $90 Stock 3.0 Junk Motor - 516whp 519wtq 20psi 91 oct built 3.0 stock n/a computer
    1994 Spirit 3.0 - 12.3@113 15 psi - Daily Holset He341 280whp 304ft/lb @10psi
    1994 Spirit 3.0 a670 - Wife's - Disassembled
    1990 Spirit 3.0 E.S. 41TE
    1993 Spirit 3.0 E.S. 41TE
    1994 Duster 3.0 A543
    1990 Lebaron Coupe 2.5 T1 31TH
    1981 Starlet KP61 Potential driver, 1981 Starlet KP61 Parts, 1983 Starlet KP61 Drag
    1998 Dodge 12v Cummins 47re 4x4 4dr longbed

  6. #746
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    I got my new intake plenum done. I bought pieces from Ross Machine Racing. I probably have $500 in it. I increased the size of my throttle body. I had a 2.25" off of a H.O. 3.8L early to mid 2000's Dodge Caravan and upgraded to a 2.75" off of a '97 Ford 5.4L Expedition. Inside it actually necks down to 2.6" and the throttle blade is 2.75". My IC plumbing is 2.5". The throttle response now is f-ing amazing! I use to have to stab the throttle about 3/4 of the way to make it take off at a resonable amount of speed. Now there's no more lag. The boost use to stall at 5 psi and gradually increase. Now it rises with the RPMs.

    Attachment 62946

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  7. #747
    Supporting Member Turbo Mopar Contributor zin's Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Love it when a combo comes together!

    Mike
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  8. #748
    turbo addict
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    Re: '04 SRT-4 engine in an '88 Caravan build

    lol, I just bought this off Ebay. Looks like the same TB except mine is 3"



    How'd you deal with getting the factory throttle bracket on and what's your TPS setup look like? mine's going on an 8v though.

  9. #749
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by GLHNSLHT2 View Post
    lol, I just bought this off Ebay. Looks like the same TB except mine is 3"



    How'd you deal with getting the factory throttle bracket on and what's your TPS setup look like? mine's going on an 8v though.
    I took apart a throttle body I had and welded on what I needed to make the cables work. I also had to plumb my IAC externally. I got the idea from an idle block that diyautotune.com sells but found one off of s Ď93 Jeep Gr Cherokee 4.0 and made it work. Iím using the Ford tps and pigtail. Since Iím using Megasquirt it doesnít care what sensor I use.

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    Last edited by A.J.; 08-06-2018 at 01:54 AM.

  10. #750
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    Re: '04 SRT-4 engine in an '88 Caravan build

    your attachments aren't working

  11. #751
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Iím doing it from my phone. Iím out of town. Iíll have to fix it Monday.

  12. #752
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    Re: '04 SRT-4 engine in an '88 Caravan build

    glad to hear your great experience with a larger throttle body.
    my 8v drives GREAT with the 58mm on it.. no loss of modulation or any other bad characteristics.

    im sure the 16 enjoys it even more.

  13. #753
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by masterjr33 View Post
    glad to hear your great experience with a larger throttle body.
    my 8v drives GREAT with the 58mm on it.. no loss of modulation or any other bad characteristics.

    im sure the 16 enjoys it even more.
    I put a larger throttle body on my Ď94 5.9 Dakota and the throttle is real jumpy off idle. I was concerned about that on my van running a larger tb and considered a progressive tb. But then I thought about how I have to 3/4 the throttle to get moving and sure enough, 1/4 throttle and it accelerates nice and smooth but isnít herky-jerky. Itís a perfect size.

  14. #754
    Supporting Member Turbo Mopar Contributor Ondonti's Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by A.J. View Post
    I took apart a throttle body I had and welded on what I needed to make the cables work. I also had to plumb my IAC externally. I got the idea from an idle block that diyautotune.com sells but found one off of s Ď93 Jeep Gr Cherokee 4.0 and made it work. Iím using the Ford tps and pigtail. Since Iím using Megasquirt it doesnít care what sensor I use.

    Attachment 62953

    Attachment 62950

    Attachment 62951

    Attachment 62952
    I used an external AIS from a 3.3 or 3.5 Intrepid. I don't like how megasquirt seems to disagree with Mopar AIS motors. Not sure if its overheating or what. I used constant setting since it didnt want to respont. On constant it would sometimes stick open too Had to try 6 AIS motors till I found one that would follow instructions...all supposedly the same.
    Brent
    GREAT DEPRESSION RACING
    1992 Duster 3.0 The Junkyard- Now - Megasquirt II/Extra. OEM 10:1 3.0 n/a.
    - Old - 11.5@125 22psi $90 Stock 3.0 Junk Motor - 516whp 519wtq 20psi 91 oct built 3.0 stock n/a computer
    1994 Spirit 3.0 - 12.3@113 15 psi - Daily Holset He341 280whp 304ft/lb @10psi
    1994 Spirit 3.0 a670 - Wife's - Disassembled
    1990 Spirit 3.0 E.S. 41TE
    1993 Spirit 3.0 E.S. 41TE
    1994 Duster 3.0 A543
    1990 Lebaron Coupe 2.5 T1 31TH
    1981 Starlet KP61 Potential driver, 1981 Starlet KP61 Parts, 1983 Starlet KP61 Drag
    1998 Dodge 12v Cummins 47re 4x4 4dr longbed

  15. #755
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by GLHNSLHT2 View Post
    your attachments aren't working
    I re-did my attachments. See if they work for you and let me know.

    Quote Originally Posted by Ondonti View Post
    I used an external AIS from a 3.3 or 3.5 Intrepid. I don't like how megasquirt seems to disagree with Mopar AIS motors. Not sure if its overheating or what. I used constant setting since it didnt want to respont. On constant it would sometimes stick open too Had to try 6 AIS motors till I found one that would follow instructions...all supposedly the same.
    I didn't have a problem with either of my AIS motors. First one was from the early 2000s HO 3.8 Gr Caravan and the second one was from a 93 Jeep Gr Cherokee 4.0.

  16. #756
    Supporting Member Turbo Mopar Contributor A.J.'s Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Here's some construction photos of my intake being built.

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    This is looking down the velocity stack into the PT Cruiser aluminum lower intake.

    Attachment 62965

  17. #757
    turbo addict
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    Re: '04 SRT-4 engine in an '88 Caravan build

    2 outta the 6 attachments work in your last post.

  18. #758
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: '04 SRT-4 engine in an '88 Caravan build

    Quote Originally Posted by GLHNSLHT2 View Post
    2 outta the 6 attachments work in your last post.
    crazy thing is that they all worked yesterday when i clicked on them.

    this is the image hosting issue that has been plaguing this site for a few years now with no one seeming to try to fix it.

    Brian

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

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