increase horsepower??

[kblake57]

I'll see about swapping the transmission, any idea how much a cam for a festiva would go for?

[nonamekid]

You can a cam for $50 right now from festiva motorsport. They are having a clearance.

[kblake57]

Any idea where are based out of?

[Damkid]

they are an internet based company, i don't think they actually have a store front shop

https://www.festivamotorsport.com

[DriverOne]

What're the regs concerning turbos? A VJ-11 would put that B3 at around 100hp. Maybe add some B6 injectors and a Swift GT clutch. I'd definitely consider port polish. The exhaust ports on the B3 are like the corners of a picture frame. Also, stiffen the suspension if you haven't already. Lightweight wheels would certainly help, if you're not running the stock 12's. If you turbo, maybe a 2" exhaust with 22" glass pack to replace the cat (if you can) and strap a Thrush muffler to the end.

[kblake57]

Hey, what exactly is the difference between b3 and a b6 engine? And where could I find one, my car has upwards up 310,000kms on it

[kblake57]

And any tips for rebuilding the motor? Might replace the cam

[fastivaca]

Hey, what exactly is the difference between b3 and a b6 engine? And where could I find one, my car has upwards up 310,000kms on it

B3 = 1.3 litre SOHC
B6 = 1.6 litre SOHC

[FestYboy]

^ the exact differance is: the casting is different, allowing the B6 block to have a larger bore (you CANNOT bore a B3 to accept B6 pistons). the cranks, rods, and all accessories are interchangeable between the B3 and B6, even the heads can swap, BUT a B6 head on a B3 will require machining for valve clearance and there are 2 generations of the B6 head, so pay attention to what year the engine comes out of.

[blkfordsedan]

If your not allowed to make any engine performance mods, then I wouldn't suggest a FMS cam. I believe even the mild cam has a noticable idle. Most people will pick up on it right away. The auto is killing you, so a swap to a manual is the first thing I would do. You may want to get a copy of the official class rules in writing.

[blkfordsedan]

I was told by Zanzer that the rod journal diameters are different between the B3 and B6 cranks and the B3 rods are longer. I know the compression height is different between the B3 and B6 pistons (B3 pistons have less comp height) and the rod bearings are different part numbers, so everything he told me the made sense. I've never had a B3 apart, so I can't speak from first hand knowledge.

[FestYboy]

that may be true for the second gen B6. and very likely for a miata B6 or B6t

[william]

I too run circle track with my festiva I have a carbed 89 with a four speed it can be a top 5 car when I can hook up but I run a 2nd gen b6 with an escort carb I run 15's on the front and 12's on the back and don't get out of 2nd gear,,, festy46 has helped a tun with my set up maybe you could shoot him a pm and he could help you out, I to can try to answer some questions

[blkfordsedan]

that may be true for the second gen B6. and very likely for a miata B6 or B6t

The rod journals on my 1st gen B6 that I'm rebuilding measure 1.7695". According to both Haynes manuals and my Federal Mogul bearing spec catalog, the B3 rod journals are 1.5724". It appears all B6 and B8 variants share the same rod journals, which are bigger than the B3. The 1.5 DOHC appears to have the same smaller journals as the B3.

[FestYboy]

^ ah, HA! well, with that info, we can make B1 engines!!! and then boost the crap out of them.

but IIRC the CRANK journals are the same?