I ported my engine rather large, now i've done bridge ports
before but this time I went with a half bridge so I can still
run two piece apex seals no problem- one of my friends
works at a machine shop and did the bulk of the porting
for me removing a lot of metal so I just had finish up making
it perfectly smooth and such but I think we might have taken
too much metal out in the direction of the e-shaft How far
is too far when it comes to this and what can be issues
with going too far inward? the outer housings are perfect
its only the center I'm curious about- Photo's to come
Thanks for any help

 

might be the pics, but that does not look good AT ALL

you are not supposed to go into the oil seal path (e-shaft direction). Not even slightly

 

yeah I know- in the center iron its way too far but the sides its only moved about three mm is that too far?

 

You can't take out any material in the direction of the e-shaft. It looks like you did and if so you now have some freshly ported paperweights, doorstops, book ends, etc...

 

"what can be issues with going too far inward?"

Burning oil/smoking, or if you've gone really far in (like yours) you'll create alot of positive pressure in the "crank case" from the intake compression getting past the control rings.

 

You can cut in towards the e shaft, but very very little and sorry but it looks like you went too far and like mentioned above you are going to have a smoker.

 

haha yeah I figured this was going to happen luckily I have several sets of 12a irons just laying around its my fault for not letting him know to only port up and down.
thanks for the help any one want some paper weights? haha

 

After dipping the furthest out oil control ring in blue paint, putting in in the rotor and spinning it inside the housing on a just checking basis I find the middle of the control ring is at the edge of the intake will this still be use able?
I know the center isn't the ring went right totally over it

 

That housing isn't useable. It's trash now. Do yourself a favor and spend the money and get some porting templates before you try it again. going down doesn't help much at all, and going in towards does nothing but trash your iorn especially with how far you ported yours. You'll be lucky if you can get it to start of you do the idle will be horrible with all that overlap and the blow by is going to be terrible and you're going to burn a lot of oil. I'd guess about a quart a day.

 

5 things:

1. this is no longer a viable engine due to ridiculously inevitable oil consumption.

2. if your friend ported your secondaries the same way, they will be trash, too.

3. i guess it technically doesn't matter because a bridge is a bridge is a bridge, but when people do half-bridges, they usually port secondary housings, not the primaries.

4. generally, porting involves changing open and close port timings to sculpt your powerband. though going in may facilitate a timing change, it will also suck oil so that area is not touched on an engine that's intended for any real use. if you're interested, you can probably use these messed up housings as visual learning tools ...

5. keep your friend away from your next engine ... get a template and do it right.

 

btw i've done it right, my fb puts down 335 at the rear wheels full bridge templated and done correctly this was just my failed attempt at a quick build from a dead engine (I got for free from an fb I picked up) for less than 50$ so try not to flame i'm not new to this haha this was just a **** around and I was curious as to how bad it was. So thanks to anyone who let me know not to put it back together haha

also last time I did a half bridge I did it on the primarys too and it worked wonderfully

 

if the "flaming" comment was directed at my post, for the record, i wasn't flaming. i've come to find that it's really pointless - so unless your post is something from the land of the un-*******-believably stupid or rude or racist or ... you get the drift, i usually opt not to respond anymore. it's easier on my blood pressure not to engage people like that. you questions were taken in good faith and that was how i approached them.

also, for the record, just because your car puts down XXX HP it doesn't mean you're not "new to this" or that you necessarily know what you're doing. i've seen a few people with tuned, running 20Bs around here that don't seem to really grasp many of the mechanical concepts invovled with their setups - it just means they have bank. on the other hand, i see a few guys around here with barely more than stock HP and they really know their ****! again, i'm just making a point, not attacking you.

so good luck with your next attempt at a buildup, congrats on the 335 and yes, chuck those housings.

 

those ports are dog ****

 

I'm still new due to the fact i'm 19 but unfortunately I do not have the bank so put haha thats why I let one of my friends hack up my irons for free and tried to do a 50$ build haha but even though i'm kinda young this would have been my 12th build, only one before failed so i'll start a new on more irons in the morn and this time i'll cut them the way I did before

 

no need to get defensive, we, are all here to learn a little.. and no need to stretch the truth.. no way your putting down 335rwhp on a bridgeport alone, especially with your limited knowledge.. please don't disrespect horsepower numbers like that!!!especially when some of us work so hard to achive the 300 +rwhp N/A club..

 

Do you thing 335rwhp come in a cracker jack box??? you think is that easy???

 

Never said it was NA BTW haha no I am not putting down 335 bridge alone I have a very large compressor on there fuel injected running a mega squirt, I never said it was easy
I'm only defensive because it seems every time anyone asks a
question they get called an idiot (not directly but you know)
of course I don't know everything thats why I asked I've never
addressed the how far can you port inward question before thats
why I asked now I know and I will do the porting myself from now
on

 

well, i took your number at face value. in terms of numbers, i know enough bullshit (and i'm not accusing you of bullshitting) gets tossed around on the forums to fertilize Brazil. most time i dont' believe them and in the same breath i don't question them either - the truth is i usually don't care. dynosheets can be faked, timesheets are much harder, but that's not the issue here.

the point of your quoted post that i would like to address is the "getting called an idiot"-part. obviously i can't speak for everyone, but for the guys that actually responded to yor thread, i honestly don't think anyone was trying to call you an idiot. i know for sure i wasn't.

however, you have to understand that all you did is to come and post some pictures of jacked-up housings, then asked what people thought. you never said, hey i've successfully built engines before - yada, yada, yada ... so i think in the absence of background information, it was a natural assumption to think this was your first - and we approached it as such. you can't expect that you're going to say something in a public place and that people are going to know the details behind it if you never put them out there with your questions/comments. for example the 335-thing (which i'm not touching, because it doesn't matter to me), but you merely threw a number out there and left it up to others to assume whatever they wanted ... so i think that's what Ito did because you never mentioned turbo. does any of what i said make sense to you?

my advice is if you're taking this stuff personally, then you'll need to post more details and background if you want answers/comments that are more useful - although, for the record, all of the answers to your actual question were useful and uniform because everyone told you the housings are no good anymore.

1

 

I wasn't taking it personaly thanks to everyone who info'ed me up haha the iron's are now wall ornaments

 

Doesnt help much that you posted in the N/A Section....

Chris

 

If you and your friends want to learn and do it the right way. Get a template from a well known source and trace it out and do it. Why would you try and port without one and then have your friends just hack it up and then come to the forums and post this. If you had built many engines like you said above then you surely would have known that these were trash and we would not be here right now. Good luck. Next time use a template.

 

I've never had to deal with this problem because I've always done it right-
I handed him the irons cause he said he had read up and had stuff to go
off of and such He didn't so I end up with these, i'd never cut in so i'd
never thought to even ask- Once it had been done then I asked if they would
even work they won't so I won't use them

This is in the NA section because THIS is my NA build for my triumph (was) I'm starting new on new irons in about 5 min and yes I have templates to go off of-

 

Yes those are usable. But they will definitely smoke not bad but very annoying for sure.

Good luck with your build...

 

12arotary I think you have very limited knowledge of what you are talking about.

I dont care how much power your other car makes, as far as Im concerned, you probably didnt build it.

Dont try to educate us like you did on this an other threads, start reading ... cause so far you are giving people very erroneous information, stating it as truth.

if you port a bridge in all the irons buddy, its no longer a half bridge, its just a bridgeport.

So again... read a LOT more

 

Here is a D-port I ported about 10 years ago, never got around to put it together as I started playing with turbos around that time....
https://www.rx7club.com/attachment.p...3&d=1225091177