Trick Flow R series, with SPEED density??????

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dixal

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Aug 28, 2002

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kansas city, MO

Aug 30, 2004

#1

• Aug 30, 2004

• #1

i installed a trick flow r series intake (upper and lower) on my speed density equiped 86 gt, the car will start and idel fine but will not rev up quickly and not very much at all. is the problem the speed density? do i need to convert to MAF??? someone told me it might be a VAC leek but i checkd for all that and i donot believe that is the problem. DO i need a bigger TB?? i'm out of ideas on what the problem is!!!! ANY ONE GOT ANY SUGGESTIONS?????

 

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Daggar

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Jul 19, 2004

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#2

• Aug 30, 2004

• #2

Yes, I've got one suggestion. If you're sure that you do not have a vaccum leak then replace the vaccum hose that runs from the MAP sensor to vac tree on the bottom of the intake. DO NOT DISCARD THE STOCK HOSE! There should be a .070 orifice in that hose that is stock. You will want to replace that with a hose that has no orifice in it then try revving your motor to see if that fixes your problem. If it doesn't, you're back to the drawing board. It's important that you try and preserve that stock hose as best you can or at least remove and keep the orifice that is in there so that you can put it into another hose. Some speed density cars run like ass when that orifice is not there. Hope that helps.

 

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dixal

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Aug 28, 2002

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kansas city, MO

Aug 30, 2004

#3

• Aug 30, 2004

• #3

thanks alot! i'll check that out. i allready ordered the MAF conversion, so that sholud help bring me some more hp atleast. ANYONE ELSE HAVE ANY SUGGESTIONS???

 

TIMMY2734

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May 17, 2002

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Aug 30, 2004

#4

• Aug 30, 2004

• #4

what else is done to the car? If its just the intake, id put the stocker back on. That intake is doing you no good at all.

 

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dixal

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kansas city, MO

Aug 30, 2004

#5

• Aug 30, 2004

• #5

its a 306, long tube headders, no acc's, running an electric water pump, 3.73's, just ordered a MAF conversion

 

TIMMY2734

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#6

• Aug 30, 2004

• #6

If you have a stock cam and stock heads, that intake is doing more harm then good...
The short runners are killing your bottom end and your stock cam wont rev high enough to take advatage of the shorter runners

 

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Daggar

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#7

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Yep... stock heads on an 86 suck. Ford's experiment with swirl ports on a Mustang. You can take em off get em ported and unshrouded then you'll have a decent set of heads but the money is better spent on new ones. The trouble is finding heads for your 86 flat top pistons that don't have piston to valve clearance problems. Trick Flow has a couple of different ones but you need to call them and speak with them directly to ensure you get the right ones. I've heard tales of the GT-40 heads fitting without problems but again you'll need to call. Since I looked into it last they've come out with a few different versions of the GT-40 heads and I don't remember what's what.

 

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dixal

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Aug 28, 2002

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kansas city, MO

Aug 30, 2004

#8

• Aug 30, 2004

• #8

ok so even if the intake isn't doing any good right now, why isn't it reving??

 

D

dixal

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Aug 28, 2002

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kansas city, MO

Aug 30, 2004

#9

• Aug 30, 2004

• #9

any suggestions??

 

D

dixal

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kansas city, MO

Aug 30, 2004

#10

• Aug 30, 2004

• #10

common someone outthere has to have some ideas? U guys are genious' right?

 

88hatchblack

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Jul 25, 2004

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Aug 30, 2004

#11

• Aug 30, 2004

• #11

i'd convert it to mass air and see what happens. my MAF conversion solved all of my problems.

 

5.0Droptop

...all those nights we shared, and you're a dude??

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May 15, 2002

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#12

• Aug 30, 2004

• #12

check your tps. Scan for codes. You can run any heads and intake, with sd the cam is the big issue. NX264HR Crower 15511 are both great SD cams

 

D

dixal

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Aug 28, 2002

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kansas city, MO

Aug 31, 2004

#13

• Aug 31, 2004

• #13

thanks guys i'll check that out, my MAF conversion will be here on the 3rd, hopefully it will do something!!!

 

tmoss

Gettin Wired

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#14

• Aug 31, 2004

• #14

You may not be able to create the vacuum levels of an SD intake with that large cross section intake - that makes the MAP think the car is under more load and may be making it run rich - hence running sluggish. Checked the plugs?

 

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dixal

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kansas city, MO

Aug 31, 2004

#15

• Aug 31, 2004

• #15

thanks alot, ill try your suggestions, ne one else have any suggestions???

 

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Daggar

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#16

• Aug 31, 2004

• #16

Hey dixal. Lemme know what you find once you remove that orifice. I'd like to know how many cars it works on vs. how many it doesn't.

 

The Shape

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Jan 11, 2002

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#17

• Aug 31, 2004

• #17

Cool Info about the orifice Daggar. I have been around here a long time , but I have never heard that metioned before. I have almost replaced all of my original vaccum hoses except that one. I am glad I read this before replacing it.

 

J

jerry beach

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#18

• Aug 31, 2004

• #18

Daggar said:

Hey dixal. Lemme know what you find once you remove that orifice. I'd like to know how many cars it works on vs. how many it doesn't.

Click to expand...

I know for a fact that I replaced that hose with a new one. I just replaced all of them that I needed for sure when I did the injectors. Didnt seem to change my SD car at all. I am not calling BS, but I find it interesting that I never have heard of an orifice in that line. This makes the gears turn a bit in my head. What if I install a valve in that line so that I can cut it off incrementally? I am sure someone has thought of it before, but is there any chance this could be used as a tuning tool?

 

The Shape

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#19

• Aug 31, 2004

• #19

I was thinking the same thing Jerry. And that is the first I have heard of it as well.

 

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Daggar

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#20

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jerry beach said:

I know for a fact that I replaced that hose with a new one. I just replaced all of them that I needed for sure when I did the injectors. Didnt seem to change my SD car at all. I am not calling BS, but I find it interesting that I never have heard of an orifice in that line. This makes the gears turn a bit in my head. What if I install a valve in that line so that I can cut it off incrementally? I am sure someone has thought of it before, but is there any chance this could be used as a tuning tool?

Click to expand...

I suppose that it could. It did not help me to use an orifice on my particular application however. The more I restricted that vac line, the longer it took for the motor to spin up so on my car it's been completely removed. In other words: My throttle response improved by removing the orifice. When I attempted to do the same to a friend's 88 we did not get the same response. His car ran very rich and there was a noticable loss of power when he got on the road. The purpose of the orifice seems to be to slow the equalization of vacuum to the MAP sensor. I'm not sure why. It may be that most MAP sensors tend to "over react" to a sudden change in vacuum (just speculation at this point). It's why I'd like to get and idea of how many work well without the orifice and how many do not.

Edit: knowing though, that I've seen 2 cars perform badly without the orifice I want to make sure that he didn't toss the thing out without being sure.