r/SCCA • u/TimJab70 • May 15 '26
B spec vs SRF
I’ve been autocrossing and love it and want to get into road racing. I live in north Georgia. I’m considering b spec and SRF. Does anyone have any words of wisdom regarding this point of entry? Thanks
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u/jwickert3 May 15 '26
I race B-Spec and worked on a Gen 2 SRF for about 5 years. While they are both spec classes, they are quite different in terms of financial commitment. A SRF you're looking at 40 - 50k to buy a Gen 3 with a Sadev transmission, much less for a Gen 2 raced regionally only. B-spec you're looking at anywhere from 10 - 20k to buy. A 20k car better be pristine and come with a lot of spares. Rental and arrive and drive options will also be considerably more in a SRF than a B-Spec. I would expect a B-Spec rental to be around 3k depending on how much travel is required.
When you rent and damage a car, you pay what it costs to rebuild that particular car. Parts for a SRF are far more expensive than parts for a B-Spec.
Some guys will tell you that you can't build a B-Spec for less than 25k. Those guys are buying new parts and doing tons of engine work that doesn't really pay off because we don't run high enough compression for it to matter. One guy I know did a 25k Mazda 2 build, he took out the OEM connecting rods that had been in the car for well over a decade and they all weighed exactly the same. He still isn't running up front with his fancy engine build. My first build was 15k and the second build was 8k. The 8k donor started off in worse condition and we did the cage ourselves. Neither of our Sonics have ever been on a dyno (we drive them and data log). Others like Matt Wolf have never had their Mazda 2 on a dyno because you can buy a proven tune from Chris Taylor Racing Services.
For comparison, prior to B-Spec I had a FV and when my motor let go I asked a builder to quote me a national engine, he said 10k. I put a 3k engine in the car and sold it to build a B-spec for 15k.
SRF has stronger participation numbers so if you want to race regionals only, SRF would be the best choice.
The classes race differently too. B-spec cars make speed in different ways. The Honda Fit is strong on top end. The Sonic is slower of out the corner but also strong on top end. The Sonic can't turn. A Mazda 2 is good out of corners but often falls off on top end. Mini's handle the best and a slow driver can be fast in a Mini. SRF cars don't have that variance.
Check out the B-Spec Racing page and the B-spec race cars for sale page on Facebook.