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-   -   My Stage 3 street port finally perfected (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/my-stage-3-street-port-finally-perfected-983145/)

Slevin_FD 01-09-12 09:19 PM

My Stage 3 street port finally perfected
 
So basically I've been porting for YEARS. And just today it finally all came together in a perfect port. Well perfect for me. I took some time today to start DGRR prep on my FC , and got the car started. These ports are going to be my shop's signature ports. So these prototype templates have finally paid off. So much R&D and so many housings and side plates have been sacrificed for this one video.

Enjoy.
http://www.youtube.com/watch?v=hyNGw-KBdRE>

First official idle with a decent tune. ( yea she's not quite bolted together quite yet at this point. )
http://www.youtube.com/watch?v=A4Fs552CV4w

Slevin_FD 01-09-12 09:39 PM

First run before I bolted everything in place.
http://www.youtube.com/watch?v=A4Fs552CV4w

onefastrx712a 01-09-12 09:41 PM

Sounds good. is that a n/a, turbo? tell us about it.

Slevin_FD 01-09-12 09:59 PM


Originally Posted by onefastrx712a (Post 10929861)
Sounds good. is that a n/a, turbo? tell us about it.

S5 turbo. 850/ 1600's Haltech e6X with a custom tune done by me. currently running a stock s4 turbo with a ported wastegate. Originally I was going to run my BB T51R, but I haven't gotten around to bolting it up yet. Engine was rebuilt and ported by myself as well.

tuscanidream 01-09-12 10:18 PM

Sounds nasty. Whats going on with that tmic?

Slevin_FD 01-09-12 10:31 PM


Originally Posted by tuscanidream (Post 10929915)
Sounds nasty. Whats going on with that tmic?

there was a slight accident involving the intercooler blowing off under boost, some pullies and some damage fixed with devcon long ago.

Texas_Turbo7 01-09-12 11:02 PM

Sounds nice and healthy. How big is it from stock?

Slevin_FD 01-10-12 12:12 AM

2 Attachment(s)

Originally Posted by Texas_Turbo7 (Post 10929962)
Sounds nice and healthy. How big is it from stock?

for all intents the port timing is damn close to bridge port territory I'd say roughly 30-4o% overall vs stock increase in size. Ive' tried to use larger street ports, but this as far as i can tell has all the benefits of a half bridge Ie. idle and revving capacity, but none of the half bridge negatives. That being said i still need to text it for the next few months to be 100% sure. Also in that video it was holding a 750- 800 idle. I have a pic somewhere let me track it down.

*** edit*** your going to have to forgive the vasoline on the plate. after the porting they sat under my bench at the shop for awhile and needed some protection from moisture.

Black Knight RX7 FC3S 01-10-12 12:30 AM

did your car just peed on you when you reved it??? :P

That is a pretty large port.

Slevin_FD 01-10-12 12:58 AM


Originally Posted by Black Knight RX7 FC3S (Post 10930087)
did your car just peed on you when you reved it??? :P

That is a pretty large port.

no heater core. well it's there just not hooked up. the plugged hose popped off at the end.

Yea it's pretty decently sized. But listen to that brap brap. It's worth it.

rotary_bünta 01-10-12 11:22 AM

nooiiice

Slevin_FD 01-10-12 11:29 AM

Thanks guys. I'll be posting up some port template/ porting prices at some point in the future. if there is enough interest.

jerd_hambone 01-10-12 01:27 PM

That port has got to be massive. It sounds so nasty. (in a good way)

Keep us updated on the testing!

gtouch 01-10-12 01:32 PM

sounds great i'll definitely be interested after testing is complete

no_luck 01-10-12 01:37 PM

i love that !!

get it on the dyno

PvillKnight7 01-10-12 02:03 PM

75% of the time spent on a port job is spent porting the intake tunnel. The port face is a part of the job. The intake path is a 3D object.
Buying a porting template is like buying a paint by numbers kit and expecting to produce a marble sculpture. The real benefit of buying a porting template is it helps prevent the user from violating the port face boundaries. Once the user recognizes the boundaries set by the oil control ring and the trailing side seal, the template is worthless.

That is a nice large port and I'm excited to see the test results.

no_luck 01-10-12 02:19 PM

so how do you know when to stop porting the intake runners?

and what would happen if you went to far? i would assume the irons useless?

when you port big do you have to keep that venturi affect going or do you just ignore it ?

20B10AE 01-10-12 06:02 PM


Originally Posted by no_luck (Post 10930724)

when you port big do you have to keep that venturi affect going or do you just ignore it ?

My assumption is that with a forced induction setup it's not QUITE as crucial. I may be way off, though.

Chris, hurry up and get some miles on the girl. Assuming everything goes well with it, you may have me wanting it done when we build my motor after taxes. I certainly wouldn't mind showcasing work like that. :) Hmmm... ZeroG stage 3 ported 13B-RE with TII sleeves, 60-1 and open dumped twin 'gates... (Especially through the new exhaust that you liked so much)

Me likey!

Slevin_FD 01-10-12 09:37 PM


Originally Posted by 20B10AE (Post 10931007)
My assumption is that with a forced induction setup it's not QUITE as crucial. I may be way off, though.

Chris, hurry up and get some miles on the girl. Assuming everything goes well with it, you may have me wanting it done when we build my motor after taxes. I certainly wouldn't mind showcasing work like that. :) Hmmm... ZeroG stage 3 ported 13B-RE with TII sleeves, 60-1 and open dumped twin 'gates... (Especially through the new exhaust that you liked so much)

Me likey!

Lol. You might like it but will your wife?

Slevin_FD 01-10-12 09:52 PM


Originally Posted by no_luck (Post 10930724)
so how do you know when to stop porting the intake runners?

and what would happen if you went to far? i would assume the irons useless?

when you port big do you have to keep that venturi affect going or do you just ignore it ?

porting is sort of semi-scientific semi artistic. The technical answers to your questions would be that you port match the intake runner openings with the lower intake manifold and lower gasket. The practical real world answer is that it varies from person to person and everyone does things differently. For example I tend to just clean up the runners and do my best to have a decreasing radius as you get closer to the actual port.
Now, there are some definite limitations to how big you can port. Back in my early days i ported a set of irons so aggressively that I went a bit too close to the oil control rings. The engine ran great .... So long as you didn't mind the smoking. Another time i ported too low and the overlap was ridiculous. the VE of the engine was all over the place. Fortunately this was many many years ago and mistakes i made on my own car.

no_luck 01-10-12 10:03 PM

gotcha!! thanks for the info

im refering more as to the runner.. not the face on the port.. im to chicken shit to go beyond the template. pvknight said 75% percent of the time is in the actual runners so it brought to mind my question.. how much porting should i be doing in the runners of the intake? be it the manifolds or the irons
thanks guys

Slevin_FD 01-11-12 08:46 AM

Took her out for a drive last night and this morning. Spool is ludacrisly fast with the stock turbo. I definitely need to put on a To4Z as was originally planned.

flipkc 01-11-12 09:47 AM

Looking forward to pricing and options...I wish this was closer to Canada but if it's worth it I'll ship my sh*t over! Haha. Nice work man!

GregW 01-11-12 01:19 PM

How is it close to bridge port territory? Kind of hard to get to bridge port territory without opening earlier like well, when you have a bridge port. It closes fairly late but so do all large ports??

Going by those pics Id say you have lots of work to do on the bowls and could clean up the transition quite a bit.

Keep at it, your on the right track but I just dont see perfection here. I certianly would not pay for it.


Originally Posted by Slevin_FD (Post 10930066)
for all intents the port timing is damn close to bridge port territory I'd say roughly 30-4o% overall vs stock increase in size. Ive' tried to use larger street ports, but this as far as i can tell has all the benefits of a half bridge Ie. idle and revving capacity, but none of the half bridge negatives. That being said i still need to text it for the next few months to be 100% sure. Also in that video it was holding a 750- 800 idle. I have a pic somewhere let me track it down.

*** edit*** your going to have to forgive the vasoline on the plate. after the porting they sat under my bench at the shop for awhile and needed some protection from moisture.


Texas_Turbo7 01-11-12 02:24 PM

I knew it had to be a good size to sound that aggressive. Sounds good.


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