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Author
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Topic: changes to my combo
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92coupe
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Member # 1957
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posted
 
 
ok well i have a 302ci honed and new forged pistons, x-cam, TFS R heads, hooker long tubes, x-pipe, 1.7 rr. well this is what im gonna do instead of NA.
swap the x-cam for a AFM blower cam
36# or 30# injectors matching MAF
gt-40 lower intake
box style upper
s-trim or larger blower
oh yea i have 9.5:1 CR
well what do you think? im hoping for 400+ rear wheel horse power. do you think its possible?
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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1SLOWLX
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Member # 558
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posted
you should raise the compression a little to about 10.5 to one. Ditch the R heads and get some AFR 185 or TFS ported ones, a custom cam and you won't need the S-trim to make the power.
Albert
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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92coupe
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Member # 1957
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posted
no thanks, ima keep the r heads because they flow really well. and i couldnt see getting AFR's, to much money for something not that great. and the blower cam is a custom cam made by AFM. thanks for the input though.
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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Stimson
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Member # 51
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posted
If you haven't gotten the AFM cam yet, give them a call and ask them about your combo. It will make over 400 rwhp in its sleep! Three thing AFM knows are cams, TFS heads and Vortech blowers ![[patriot]](graemlins/patriot.gif)
Posts: 2373 | Registered: Jun 2000
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Red97SVT
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Member # 2811
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posted
The R heads may be a bit of over kill and actually flow too much and hurt throttle response because it will be hard to get any velocity to fill your cylinder efficiently until your way up in the rpm range. Unfortunately your limited on rpms by your reletively stock bottom end and possibly your valve train (don't know specifics).
The 185s are probably cheaper than an S trim and you'll have the added kudos of making 400 N/A.
Your R's are race heads and don't really match your combo. Bigger isn't always better, its all in how you use it ![[Big Grin]](biggrin.gif)
Just my $.02.
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Engine: HCI forged 0.30' over N/A.
Suspension: Full Griggs by Apex.
Drive train: T-56, Auburn pro, 31 spline axles, 3.73s.
Posts: 246 | From: Manteca | Registered: May 2003
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Stimson
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Member # 51
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posted
He already has the R heads and AFR heads as magical as people on the internet make them out to be will not make 400 rwhp NA on his stock bottem end 302 with an equally magical cam. The blower will "make up" for much of the deficiency the big heads have on this combo and give him his goal of 400+ rwhp, while being a little bit soft at lower RPM's. Nothing a set of 4.10's can't fix though
[ May 18, 2003, 12:43 AM: Message edited by: st5150 ]
Posts: 2373 | Registered: Jun 2000
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jayl
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Member # 185
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posted
if you wanna ditch those crappy overrated tfs r's you just let me know
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Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
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Red97SVT
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Member # 2811
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posted
quote:
He already has the R heads and AFR heads as magical as people on the internet make them out to be will not make 400 rwhp NA on his stock bottem end 302 with an equally magical cam. The blower will "make up" for much of the deficiency the big heads have on this combo and give him his goal of 400+ rwhp, while being a little bit soft
Ok,ok. I give.
I was just trying to point out that the R's are a bit of over kill. Well matched parts will make better power than mismatched parts. Its the whole combo that needs to be considered.
Maybe I'm just bored and want to say something... ![[Smile]](smile.gif)
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Engine: HCI forged 0.30' over N/A.
Suspension: Full Griggs by Apex.
Drive train: T-56, Auburn pro, 31 spline axles, 3.73s.
Posts: 246 | From: Manteca | Registered: May 2003
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Stimson
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Member # 51
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posted
Its okay, this same topic was discussed a few days ago and it got pretty heated. The guy just wants to work with what he has, and not build some "ideal combo".
Posts: 2373 | Registered: Jun 2000
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Red97SVT
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Member # 2811
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posted
Everyone here has an opinion. Thats why this board is so much fun!
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Engine: HCI forged 0.30' over N/A.
Suspension: Full Griggs by Apex.
Drive train: T-56, Auburn pro, 31 spline axles, 3.73s.
Posts: 246 | From: Manteca | Registered: May 2003
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mustanggt5091
All I need is.....
Member # 444
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posted
Should make respectable power no matter what heads, AFR or TFS! Everyone needs to calm down with this pointless argument! I've seen very powerful AFR combo's and very powerful TFS combo's! Both make great numbers, one maybe a little more than the other! One also costs alot more than the other! Good luck man! Post the dyno numbers when you get them!
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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LAST302
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Member # 808
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posted
School me or something because I have always thought and have built my blower motor to have lower compression. Why the 9:5:1 and someone else saying to raise it. I was always under the impression that a supercharged motor loved low compression, say 8:5:1 like mine is.
Posts: 1147 | From: Disco Bay | Registered: Jan 2002
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1990GT50
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Member # 2119
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posted
he said raise it and go n/a
compression should be low on a blown motor
Posts: 877 | From: Benicia | Registered: Nov 2002
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92coupe
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Member # 1957
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posted
well the compression ratio is the only thing holding me back from a HUGE blower. like soemone already said i want to work with what i have. i will NOT ditch the R heads. i picked them up for an amazing price, and i forgot to say hat they are o-ringed. and the velocity the heads MIGHT lack will be made up by the blower forcing it in. what size injectors should i get? would 30# and a 255lph pump be enough. im not looking for just gonna work, i want it safe! id rather step up injectors and have an adj. fuel regulater dyno tuned.
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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The Rick
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Member # 327
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posted
um, i'm no expert but I know the 30'lbs injectors should be no way big enough.
Most guys with blowers/motor work run 42lbs+ injectors.
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90GT: h/c/i
05 wrx
Posts: 868 | From: plumas lake (sacramento area) | Registered: Jul 2001
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mustanggt5091
All I need is.....
Member # 444
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posted
how much boost?
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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92coupe
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Member # 1957
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posted
around 10psi
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
42's are the minimun u can run and it doesnt really matter because ur block is gonna crack anyway, unless somethin else is gonna go first, good luck though
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
42's are the right size. I wouldn't worry too much about the block Craking. With what you have you will be well set-up to meet your goal of 400+. Get it tuned and it will run like a champ. Just think of the blower as a band aid for not having the "ideal" set up. Boost is a wonderful thing, and I will know its powers in a month or so.
[ May 19, 2003, 06:37 PM: Message edited by: 98slowhoe ]
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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92coupe
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Member # 1957
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posted
the block is the only thing im worried about. shit if it brakes ill make a blown 331, or 351w. i dont give a shit as long as it make the 400+ to the wheels. im probably going to be selling the car shortly after.
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
i think a stock block will crack at around 500rwhp, or so i have heard from a few people, but then again some may crack way earlier or a way later
and if u are not over 400 to the wheels with that combo something is really wrong
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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mustanggt5091
All I need is.....
Member # 444
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posted
You should be fine! I would also recommend the 42's
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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420racerx
New Member
Member # 2838
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posted
check out my car in the album guys
Posts: 6 | From: Palm Springs | Registered: May 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
if u really want us to see ur car just post a pic of it ![[dance]](graemlins/dance.gif)
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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92coupe
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Member # 1957
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posted
quote:
Originally posted by 420racerx:
check out my car in the album guys
dont see how your car had anything to do with my combo?
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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