I’m doing a carb conversion on my brand new 22RE that’s in my 4Runner. I’m trying to decide which carburetor I should use. I scored a really nice Offenhauser dual port intake that I am going to use. Which carburetor do you think would work best? The progressive 32/36 or the synchronous 38/38?

i’ve looked around for a little bit and can’t really get a good idea which one would be best. I am thinking I may put a performance cam in it later on and so I’m leaning towards the 38/38.

 

I have an '87 22R 4wd Truck. I have run both carbs and I like the 38 much better. I originally purchased the 32/36 and ran it for a few years. I had an issue with it and contacted Redline Weber to see what, if anything, could be done about it. There was no fix but while talking to them they told me I'd be much happier with the 38 so I decided to try it. What a huge difference in performance. With the 32/26 I felt like I was constantly heavy into the throttle and they confirmed that was normal for a 32/36. With the 38 I feel like I use much less throttle yet it has much, much better throttle response. I have had the 38 for probably 14 years now with no issues. Whichever you choose make sure you follow the setup instructions to a "T" as they are finicky to setup the first time. You will also need a fuel pressure regulator and gauge as they only want 2 -3 lbs. of fuel pressure.

 

Thanks for taking the time to make such a detailed post. This is exactly the kind of information I was looking for, I really appreciate it.

 

You are very welcome.

 

Got this thing running today with the 38/38. It runs fantastic.

Thanks again for that piece of advice.

 

Great truck and cat!
would the 38/38 fit on a stock manifold also or would it require an adapter?
I was thinking about using a carb and stock manifold just to run a rebuilt engine on a stand before installing it.
would keep the FI for driving, though.

 

You have to run an adapter. The two piece that comes in the Weber kits is prone to air leaks. Use a good sealer like Hylomar or buy a one piece adapter.

 

Awesome! I love it when I can help someone out.

 

I can attest to the adapter leaks. Two weeks after I bought my 82 pickup a few years ago, I started smelling gas and it was leaking there. I tightened it, and it hasn't leaked since. It sure looks like a rigged up setup though. When I saw it, I thought it was a homemade plate.

 

I run a one piece adapter so I don't have to worry about the two piece adapter issues.

 

I just completed converting a Chinese 38/38 into a progressive. (Steps found on YouTube) To me, it is hands down the best carb that exists for 22R. It has that extra kick that these trucks need but also great fuel economy. I just managed to get 22 mpg on a test trip. Highly recommended.

 

I put a 32/36 on my 87 22R after rebuilding it. It took a lot of adjusting and I'm still fine tuning it, but it does pretty good. It really flies down the highway.
But if I put a carb on my 94 I'll try the 38, thanks for the information

 

Yeah, they take some tinkering to get it right.