x275 class

PittSpeed Automotive
1

been watching the x275 class. seems to be growign in popularity on the east coast. wondering if anyone has been thinking of running this or not? looks like a fun class to me. i am thinking of dropping down in tire size and runnning an event possibly

---------- Post added at 08:04 PM ---------- Previous post was at 08:01 PM ----------

some of the rule
275 Real Street Updated Rules

Body & Glass

  • Must have working headlights and tail lights
  • Stock appearing interior, single seat, carpet, door panels, factory
    “type” dash
  • Lexan permitted (tech will have descretion to not allow “yellowed” or
    poorly mounted lexan on race day)
  • Windows must be operational
  • No wheelie bars

Suspension

-stock type suspension factory frame rail
-ladder bar with factory frame rail add 50 lbs
-Coil overs and anti roll okay

Tires

-Maximum rear tire size allowed is 275/60-15 designation, deduct 100 lbs
on 255/60-15
-these radial sizes are equivalent to a 275 >
Size wheel Size Equivalent
P275/60R15 15 28 X 11.50R15
P295/50R16 16 28X11.50R16
P295/45R17 17 28X11.50R17

-Tire must be used as intended from manufacturer. No alterations
permitted.

Power Adders

-Single type power adder only

Exhaust

-Must have mufflers except turbo entries

Weights-

4 cylinder - n/a 2150 lbs

4 cylinder - turbo, nitrous or s/c 2650 lbs

V-6 - n/a 2450 lbs

V-6 - turbo, nitrous or s/c - 2950 lbs

(max 76 mm turbo, .082 jet, or D1 or = s/c on 4 and 6 cyl entries)

Small block N/A – 2750 lbs

Small block nitrous .082 nitrous jet max– 3150 lbs

Single Spray Bar Plate Only (Double Crossbar Plates will have to cap off one side)

Small block turbo 76 mm & D1 or = supercharger - 3300,
no billet wheels
(deduct 50lbs 70 mm and smaller turbo)
(deduct 50 lbs for non intercooled)

Big block N/A – 3050 lbs

Big block nitrous .065 nitrous jet max – 3450 lbs

Cylinder Head/Induction-

Single stage plate only no multi stages # 4 nitrous line

4150 carb only

23* Chevy - 20* Ford - 18* Mopar - *15 LS

Conventional Iron BB heads only

SB Limited to 427 cu in

BB limited to stock deck height 525 cu in

Buick, Pontiac and Oldsmobile engine combinations run at small block
weight and are limited to nitrous or n/a only

Electronics-

Ignition boxes limited to standard type ignition controls (No Slew or
Traction or Boost Controllers)

Digiset or time delay for nitrous control only

EFI okay (NO BS3 OR FAST)

E85 okay

2

I"m actually thinking of running a drag radial now and MAYBE a 295/17 tire size but was thinkin of sticking with 18" wheels and trying the new mickey thompson ET street radial 2’s. WE shall see.

This class looks fun but I dont competively race my car and not sure it qualifies…its too fat, and has too many turbos.

3

looks like maybe the rustang build might be built around something similar

4

I was looking at this myself, its a VERY competitive class, the bump at imports vs domestics in this class was 8.9x

these guys go 4.80’s in the 1/8th, really getting it done

5

yeah any of those outlaw 10.5 type or other drag radial classes all seem to run 4’s in the 1/8 and run mid 7’s 1/4…thats just ridiculous. My street car will not see those times

6

Yes i would like to,

7

sharing a window crank with passenger is ALLOWED

8

:rofl: i am moving up mikey. it has 2 permanent window cranks now lol

9

Don’t think any of us really have the funds to be competitive in that class, there are some heavy hitters/fast cars that run it. Exciting to watch tho.

10

http://x275.net/?page_id=7

new rules released for next year should be pretty wild to watch.
would be cool to make up an entry level type for locally

11

Sweeeeeeeeeeeet ording my motor from GBR!

12

I have to start losing weight, need to get my pig under 2950lbs

13

your getting a motor from Great Britain?

14

yup

15

sweet

16

awesome