This is a discussion on F.A.S.T. Injectors?? within the Internal Engine forums, part of the LSx Technical Help Section category; I'm in the process of building my cammed '98 (TSP 228R). Basically started with a bare block and rotating assembly ...
05-20-2011, 09:45 AM #1
I'm in the process of building my cammed '98 (TSP 228R). Basically started with a bare block and rotating assembly with pistons. We've cleaned that up and I've got new bearings in, and the cam is ready to be dropped in.
Upgrades already there:
TSP upgraded factory roller rockers
Mahle aluminum flat-top pistons
Heads are factory 241s
Anyway, I'm now looking at what injectors I should put in and was wondering what your experiences are with F.A.S.T, or to see if you guys had other suggestions. This will be a daily driver, too, so I can't really go TOO nuts with the rest of the build. Suggestions??
I'm also in need of ignition for the same car and not sure what to go with there... any help is appreciated!
1983 T/A 305 4BBL...SOLD!
1988 GTA 305 TPI/M5 (Emma)
1995 Firebird 3.4 V6 (Ellie)
2001 Firebird 3800 V6 (Missy)
1998 NBM T/A...LS1/M6 coming soon (Lacey)
1992 Chevy C2500 HD...(the tow rig)
05-20-2011, 09:54 AM #2
I've heard good things about both FAST and Siemens injectors.
When researching injectors for my FI built, most of the builders I talked to used Siemens, but FAST were also popular.
Have you calculated what size you need?
05-20-2011, 10:20 AM #3
05-20-2011, 03:40 PM #4
Fast injectors seem to be popular, as well as the least expensive it seemed on egay. iirc
Been considering 42.5's myself actually.. I don't know anything about the siemen injectors..
05-30-2011, 04:38 AM #5
- Join Date
- Mar 2006
Once i do throw in heads i might be going with the Fast injectors as well.
05-30-2011, 08:02 PM #6
- Join Date
- Nov 2005
- Bonner Springs, KS
- 99 TA
I run FAST 50 lb. injectors...didn't need that big now, but tuner said he could tune them fine with my current mods, plus I wouldn't have to upgrade down the road, so far no issues.
05-31-2011, 06:50 AM #7
- Join Date
- Mar 2007
You should be finewith the 98s stock injectors. Thy were rated at 28.5#s. I didn't have to go to bigger injectors until I changed to a FAST intake.TSP 347 SB, TSP Stage 2.5 PRC LS6, TSP MS4, Performabuilt Stage 2 4L60E, Yank PT4000, 4.11s, Fast 90/90, FTRA Cold air intake+all the free mods, Dynatech Supermaxx Exaust System, DMH Cutouts, Hooker Catback/FTRA Tips. Tuned by RPM/Garner NC. 11.28@119
05-31-2011, 09:31 AM #8
I scored a set of practically-new stock injectors for $50 from someone on Facebook. SCORE!!
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