Since nobody wants to post a pic of there stock manifold

Are these Welds OEM on a 90-91 B18A1

 

Ummm I dont think so, that looks like a puddle weld, and as far as I know the manifold is 100% cast.

That allmost looks like someone drilled it for NOS and then plug welded it. Only other thing I could thing is that there was a leak and they tried to weld up all the areas.

 

ok anybody have a pic of a stock manifold i can compare

the top 4 i give you looks like it could be for Direct Port

but the other 3 idk about

 

Could these be a OEM mod for EGR cleaning, i know when i worked at Honda they had a couple Preludes with EGR troubles that you had to drill threw a freeze plug and scrape the **** outa the inside of the Intake, wonder if this was like that but before the Freeze plug idea?

 

now that i look at it i think it realy is the EGR cleanup, might not be OEM or they might of shipped the manifold out to be welded up

 

Fronm what i understand the EGR does not reallt work on fuel injection cars, and I dont believe there would be four of them. Check this out..... http://www.carcarecouncil.org/...shtml

 

that was welded. i dont know why but it was welded.

 

EGR is just that Exhaust Gas Recurlation

it wouldnt be there if it didnt work, its only on the 90-93 cars because of tighter emissions laws back then and the motors werent build as well to cope with them

the whole deal is the computer regulates Exhaust back into the intake stream, monitord and regulated by the IAT, O2, CTS, TPS and all the sensors, so you let the unburnt hydrocarbons back into the intake mix that with some fuel, and your reducing your emisions by however much your taking back out of the exhaust

but since it is exhaust gas's they are full of carbon and NOX and everything else so its natural to see build up, i guess the car i got the motor from lived in a different climate, was driven by a grandmother, or just used bad gas, and became clogged up and they had to fix it, it coulda been they worked on it 5-6 times but nothing fixed it so they sat down and drilled it out and cleaned it out and sent her on her way

That is just what i see happing based on my stent as a Honda Tech and knoledge of engines, but im still open to suggests or somebody else that has seen this first hand or whatever

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by &raquo;</TD></TR><TR><TD CLASS="quote">The Exhaust Gas Recirculation (EGR) valve and its related components first appeared on automobiles in 1972. The valve may be controlled by vacuum or electronically depending on the year, make and manufacturer of the vehicle. The use of EGR is on the decline since manufacturers began to use fuel injection, which provides more accurate control over the fuel and air mixture.</TD></TR></TABLE>

 

looks just like my manifold in my room

 

bump for the night crew

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by projectTeG &raquo;</TD></TR><TR><TD CLASS="quote">looks just like my manifold in my room</TD></TR></TABLE>
yours has these same welds? do you have a pic out of curosity?

 

Wow, crazy.. i'd like to know too just to know. Is that stock?

 

maybe they were using direct port nitrous?