Curse of the Plenum Spacer
- Thread starter MASSIVE
- Start date
so i wont have to do anyting just istall it right? i'm planning to do the copper iso thermal plenum spacer and the Mrev 2, and hopefully a weaponR intake..
sorry ahead of time for jacking this treath.. but anyone have an idea of which intake perform better, weaponR or Fujita?
thank you all the help.
Jonathan.
sorry ahead of time for jacking this treath.. but anyone have an idea of which intake perform better, weaponR or Fujita?
thank you all the help.
Jonathan.
Last edited:
MREV2 alone will give you comparable performance to what the plenum will give. If you get the MREV2 AND the plenum spacer, your gains from the MREV2 won't be as good as the spacer. It'll be around 3-5 hp max. Not a good performance for $400 IMO. Just get the spacer, you'll be happy..
MREV2 is just a lower manifold with the two front intake runners cut lower on top. If you're handy, you can do the same with an angle grinder.. No need to pay $400 for that thing.
Just get plenum spacer. If you're looking for higher high rev range power, go for 1/2". If you're looking for a more balanced but slightly lower power, go for 5/16". IMO, 5/16" is a better fit for our heavy CUVs..
Alternatively, you can just get the MREV2 but why spend $400+ when you can get the same performance @ <$200 ?
i just iinstalled an mrev2 with iso thermal copper and 5/16" spacer yesterday/today.
I started yesterday and snapped one of the 6 bolts thats inside the plenum. It snapped when I was torqing to 80 inch lbs. I actually torqued to 25 then 40, 65, 80, and then 100. Sometimes bolts just weaken after time with them expanding and contracting. The stock bolts are pretty cheap as far as tensil strength.
One way to tell tensil strength is by droping the bolt on solid concrete. A bolt with higher tensil strength will have a higher tone. The stock bolts sounded like pot metal, gave more of a thunk sound when dropped. The hardend bolt I replaced it with had a ting sound. $1.55 each, you get what you pay for.
oh yeah, i finished today 'cause all the part stores were closed for new years.
I started yesterday and snapped one of the 6 bolts thats inside the plenum. It snapped when I was torqing to 80 inch lbs. I actually torqued to 25 then 40, 65, 80, and then 100. Sometimes bolts just weaken after time with them expanding and contracting. The stock bolts are pretty cheap as far as tensil strength.
One way to tell tensil strength is by droping the bolt on solid concrete. A bolt with higher tensil strength will have a higher tone. The stock bolts sounded like pot metal, gave more of a thunk sound when dropped. The hardend bolt I replaced it with had a ting sound. $1.55 each, you get what you pay for.
oh yeah, i finished today 'cause all the part stores were closed for new years.
Last edited:
hey HYME do you have a Rev Up engine? and since you have both installed, have you have a chance to test it? how is the performance?
It just opens up a little more space on the front two cylinders. On the Revup motor, the upper planum has shorter runners and when you replace it with even the non-revup lower plenum, you'll feel torque gains on top of the spacer.. If there was a way to extend our intake runners without decreasing the gap in front of them, our engines would benefit as well but that's not possible really..
Here's non revup lower:
Here's revup lower:
And here's the MREV2. See the cut parts?
I'm playing with a spare lower and upper plenum now and I didn't see ANY difference between our lower plenum and MREV2 except those cut parts. You can do it easily with an angle grinder really.. I did it in 15-20 mins..
Unless he did a motor swap, no.
gchristopher9
Member
i think the word your looking for is TENSILE
tinsel is something you put on your christmas tree
tinsel is something you put on your christmas tree
hehe, well honestly I'm not sure how much it really added. I haven't been driving it for two months now because I have a probationary license right now. I can only drive to work and back home. I get dirty at work so I only drive my truck (4 banger tacoma).
Unfotunatly I got one too many speeding tickets.
I did drive it around the block onto a lonely street to test it. It felt pretty good, but like I said, not driving it for two months it's hard to tell for sure. I got four more months of driving like a grandma, it sucks!
Unfotunatly I got one too many speeding tickets.
I did drive it around the block onto a lonely street to test it. It felt pretty good, but like I said, not driving it for two months it's hard to tell for sure. I got four more months of driving like a grandma, it sucks!
aye thank you much... hope those 4 months pass by fast for you..
everything else on this fx35 is bone stock so now i'm saving for intake. I've been wanting the LMS for a while, the one that eliminates the air flow sensor body (not the short ram)
not too fast, they may ticket me for that too!
and tensil (thats how i spelled it) is me forgetting a single letter and to lazy to spell check. I'll take your word for it cause i'm also to lazy to look up the word tensile on-line.
=)
not too fast, they may ticket me for that too!
and tensil (thats how i spelled it) is me forgetting a single letter and to lazy to spell check. I'll take your word for it cause i'm also to lazy to look up the word tensile on-line.
=)
Last edited by a moderator:
FYI: Motordyne spacer kits come with new bolts, washers etc (I think the come in black, since the ones I used were)
the bolt I snapped was the one that holds down the lower plenum so it was stock. Motordyne sends bolts for upper plenum since they need to be longer due to increase hight of what ever size plenum spacer you get. I also like the fact that they replace the two guid pins with bolts.
The two align just fine without guide pins.
The two align just fine without guide pins.
well that sucks. having the intake taken apart and leaving it like that sucks. Glad you got it fixed.
Maybe you need to get you torque wrench checked for accuracy?
actually the torque wrench was a new x-mas gift. Craftsman microtorque and yes it is inch lbs. I think the bolt might have been defective or simply seen to much stress 'cause I was not even close to 100 inch lbs. I was pissed at first and went around torqing different things in the garage. My bolt snapped in the same place as the pics posted here, about 1/4-3/8 up on the threads. Motordyne says to torque to 40 then 80 and then 100 inch lbs. I went 25, 40, 65, and then snapped on way to 80. Then back off. It sucked but I was very glad to see a little bit sticking out, I was able to remove the broken part pretty easy with vise-grips.
Last edited: