Hey guys, it looks like my old 305 is getting tired. They just opened the tracks here in Guam and we have races every other Sunday. Every mustang I run into now a days have superchargers. I was thinking of swaping in a ZZ4 355 hp crate motor and running straight carb, or should I stay with the computer??? Also will the motor bolt right into the engine bay, will I be able to use my stock trans, and what problems will I run into besides the stock pulleys not aligning. Thanks guys, any input would be helpful

 

You have decent mods for you're current 305. Instead of buying a crate engine, why not look around for the right short block assembly.... then pick you're own heads to match.

Maintain you're ECM/TBI (but upgrade it).... especially if you wanna go the 'boost' route in the future. You'll be much happier than swapping over to a Carb, unless you like tuning on a regular basis.

 

If he doesnt like to go fast...

 

Do you mean he'll go faster with a Carb? I was only implying that Carb's require 'weekend' tuning on a regular basis (especially if he leans on it all of the time, which I'm sure he'll do).

BTW NOCANDO.... there's the option of TPI as well.

 

If fuel economy is a concern, stay with EFI.

If you want the most "bang for the buck" performance, go with a carb.

 

Nonsense.

I haven't touched either carb, except for deliberate "improvements" such as installing the Proform body in the Holley 650 DP - did take a weekend to get jetting and idle adjustments in. Before/after that, didn't do/haven't done anything.

However...

My typical recommendation is to stick with the induction system you have. If carb, stay carbed. If TPI, stay with TPI. If TBI, find a deep lake... (JK, TBI can be made to run, too).

 

That's pretty good. We bracket raced my 86 IROC the entire summer, running both a 454 and a Carb, and had to consistently re-tune the engine to run the 'right' number each and every weekend.

He mentioned above racing supercharged Mustangs, and if he plans on running both at the track, and the street... I advised him to stick with EFI. If he runs a Carb both on the street, and at the track, he WILL be re-tuning each and every weekend (I do).

 

with the proper carb, once its dialed in, it shouldnt have to be changed unless the conditions change to the extreme one way or the other... so dont go driving up any mountians...

with the TBI, once its dialed in, it shouldnt have to be changed unless the conditions change to the extreme one way or the other...enough that it cant compensate from where you tuned it..


the TBI will cost more to be fast as the carb... and take longer to get the ideal effects... look at how long the TBI guys spend messing with their modded cars and look how meny carbs are up and running sooner...



personally though, i think they are both bad solutions. the carb would work temp for me, but i would really look into a decient multiport setup. probly TPI based for cost reasons.

 

You're right, and I'm definitely not saying that TBI is better than a Carb. It's just for his application though, and especially for the street.... EFI might be a better choice (especially with the mentioning of boost, which can always be kept as an option for the future.... with low compression of course).

I myself run a Carb, and I wouldn't have it any other way.... but I enjoy re-jetting the Carb for the track, then again for the street. I don't mind blown power valves, nor sticky chokes.

EFI is more reliable (not faster, just more reliable).....

 

If you get a carb dialed in, and I mean really dialed in (i have gotten pretty good at adjusting carbs with 4 corner idle), then little differences in weather shouldnt effect you too much. Its when people jet a carb and think its dialed in, and it is on the extreme rich or lean side that people start to have problems.