[Dk]Rx7

Hey guys,
I was just wondering, is there any reason why I would want to choose the Greddy 2-row over the 3-row for a single turbo setup (gt 35/40). What would be the pros and cons. I tried searching but I couldn't really come up with anything. Additionally, would I be able to even attempt roadrace with a 3row? Thanks and hope to hear from you guys soon.

[Dk]Rx7

anyone have any suggestions?

es

If you're going to run really big boost #'s then get the 3-row. If 17PSI is going to be your max go wtih the 2-row.

The 2-row will be easier to install. The O.D. of the turbo outlet will match the O.D. of the IC inlet pipe, less material needs to be removed from the front bumper skin, & you wont have to hack saw off the 2.75" flange from the Greddy Elbow. All of these were surprizes to me, & the hardest to deal with was getting my hands on a 2.75" to 2.5" reducer (for the turbo), and trimming the bumper skin.

The 2-row will have a quicker boost response as there is less area to fill before pressurization.

The 3-row will provide a better overall flow rate since the pipes are larger, & should cool the charge better.

I've read a post from someone that the 3-row has a greater pressure drop across the core. I have no idea if this is true, but would love to know...

_Drag'nGT_

Aren't there people with 2 row coolers running higher than 17lbs of boost?

es

I'm sure there are, don't take the suggested boost level to be gospel. You could probably run 20PSI through the 2-row & cool the charge off with H2O.

What I was trying to say is that the 3-row can cool the charge better, but does have a few other things besides the cost that make it a tough decision. If I knew what I know now I would have gone with a 2-row & used the extra money for new shoes or something. I'm not dissatisfied, but the 3-row is probably better suited in a dedicated drag car than in a street car.

_Drag'nGT_

Okay. I think I get it.

What about the GT35/40? What do you suggest? 2-row or 3-row?

es

2-row if it's a street car that'll never (or rarely) see over 17PSI since it's less expensive, & easier to install.

It depends more on the owners relationship with the car than what turbo is in it...

3isacharm

this is a decision i have been pondering myself for the last month or so. i should get the 2 row but i just can't deny the sickness of the size of the 3row.

hey es do you think that u could post a couple of pics of your 3 row?

would there be any hp difference between the two intercoolers?

es

I just posted a pic of the front of my car over here:
https://www.rx7club.com/forum/showth...55#post1588755

Last post.

I have some pics without the bumper skin on, but they're on my laptop, I don't have a place to host them, the forum wont let my pics through...

1FooknTiteFD

For a street/strip car maybe a 3 row is better. But for an autox/track/street maybe the 2 row is better because more air can flow through the intercooler core and get to the radiator better. Just my 2 cents...

ZoomZoom

iTrader: (2)

I swear there was just a thread on this same thing. I cant remember which thread it was though...

[Dk]Rx7

=) if you find it let me know.....

ZoomZoom

iTrader: (2)

https://www.rx7club.com/forum/showth...hreadid=163794

Silver93T

I am running a 2 row R-Spec core (the one designated for single turbo) It is different than the other 2 row which is a v-spec core and intended for less boost. I have no problems with the intake temps staying cool at 20 psi and also road race the car. With my ducting to the radiator my coolant temps rarely exceed 100 degrees C.

vosko

iTrader: (4)

i have the 3 row because bigger is always better

93redFD

I have 3 row also and my stock bumper is f**ked.. I was told that the 2 row would have less lag.
Pluto has a 2 row and its been of his car for a while, he runs 25+ psi.

Silver93T

Pluto has the older style 2 row, which is thicker than the new one.

1FooknTiteFD

where did you get the R-spec core? Is simply the greddy 2 row that is supposed to be used with the single turbo kit? Jason told me that there was no difference in intercoolers between the twin turbo kit and single turbo kit.

Silver93T

According to greddy, the single turbo 2 row is an r-spec core.

Silver93T

http://www.greddy.com/products/Intercoolers_frame.htm

[Dk]Rx7

thanks for all the input guys. I was just wondering....will I be at a disadvantage going with the 3 row and I only boost like 15psi or less? The reason I ask this is because I can get both of them for the same price (might as well go bigger just in case?) Will I be hurting anything (namely my turbo with pressure drop?) or its just preference? Thanks for reading and hope to hear from you guys soon.

ZoomZoom

iTrader: (2)

from what one of these guys said (93redFD) it doesnt fit as well.

[Dk]Rx7

yea i figured it would be a pain in the *** to install the 3 row. Aside from the fact that the fitment is hard to work with, is there any other reason not keep my 3 row? I have a brand new one coming in, its just that I don't want to keep it if there are more cons with a 3 row (mainly performance and reliability cons). Thanks for informing me about everything, hope to hear from you guys soon.

(PS: I mainly got the 3-row because I was hoping to boost more than 15psi later on, and I thought that a 3 row would be more efficient than the 2 row after 15psi. What made me second guess myself was the fact that other people are boosting past 15psi with the 2row and haven't seen any problems.)

93redFD

sorry I dont have a pic or anything, but if I did, you might rather have the 2 row.

ZoomZoom

iTrader: (2)

I was told the Air Cond would be near impossible to retain with the 3 row. Looks like 3 rows downsides are more pressure drop, fitment and Air cond removal. I am sure you can relocate some A/C components if your really set on keeping the A/C. Boost response may or may not suffer. I was told by Dave at KD rotary that there is 2-3 more psi of pressure drop over the 3 row than the 2 row. Several of us run more than 15 psi without any increase in intake temps. There is no doubt that the 3 row will cool more in very high boost and maybe even higher ambient temps.