1bad91Z

iTrader: (1)

Edelbrock is claming that the E-Tec 170's are an improved copy of vortec heads and the E-Tec 200's are an improved copy of the fast burns. They claim that E-tec 200's flow 15% more than fast burns and they advertise 253CFM @ .500 lift, 259@ .600 lift. According to Chevrolet the Fast Burns flow 266 @ .500 and 275 @ .600 , although now I'm very sceptical. Does anyone know anyone who have or has used the E-Tecs?

1bad91Z

iTrader: (1)

any know about these heads? Edelbrock is claiming that the E-Tec 200's flow more than the fast burns!

Karps TA

iTrader: (2)

They're pretty new heads so it may be awhile before anyone has any opinion of them. They look like they are priced better than the GM pieces, and I wouldn't doubt that Edelbrock could have cleaned up some casting flaws of the GM pieces to get greater flow numbers. I'd probably keep an eye on the Car Craft type magazines they'll probably test them in the near future.

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1985 ASCD Ram Air Trans Am 350/5spd Pro Action heads, Comp cams XR282, Edelbrock Air Gap, if it can be changed it has Readers Ride at https://www.thirdgen.org/rides/index...ew&rideid=1067

-=ICON Motorsports=-

1bad91Z

iTrader: (1)

I spoke with Edelbrock on friday and they even hinted arround not to use the E-Tecs for the combo that I'm going with (not enough low lift flow) They would be pig until you reach the top end! Just thought I'd pass this on!

wiggy'sIROC

What combo did you talk to them about? I am trying to decide on which heads to use also.

Mark

1bad91Z

iTrader: (1)

Do yourself a favor and get the GM aluminum fast burn heads. I done EXTENSIVE research over the last few months on cylinder heads and I've talked to numerous companies and machinists. After you get your fast burns, take them to a machinist that you trust and have them mildy ported and polished, get bowl and seat work, and a competition 3 angle valve job. Those heads after that done will be phenominal! Keep in mind that you will need a scoggin-dickey vortec style TPI base if you intend to use these heads. Also keep in mind that the scoggin-dickey vortec base flows more air than any standard style TPI base, it even out flows the TPIS big mouth base. Read the topic 1bad91Z, in a little while, I will post my entire combination that should make 450-500HP and 475-525ft lbs of torque (all motor).

MorgRS

Just a quick note: E-Tec have bigger valves
than Fast Burns. Also, the wet flow of the F/B's is controlled a lot better...very important to us street guys.

88IROCs

Car Craft tested the E-Tec heads in their September 2001 issue.

I scanned the results here

Be patient, my ISP is run by ex-Ford engineers(they promise 100 times faster than dial-up, but are lucky when they deliver 20 times faster)!

[This message has been edited by 88IROCs (edited November 19, 2001).]

Steve91Z28 L98

According to ***** at ******* ******, the E-Tecs are total crap. He said they dyno tested a 350 w/ LT4 Hot Cam, E Tec 200 cc heads and their Vortec tpi base. This was also with stock runners and throttle body. He said with the stock chip and no egr (supposedly the computer was pulling out a lot of timing because of this) it made just over 300 hp. On the same motor with the Fast Burns, the motor made around 360 hp. I stil question these claims but I see no reson that he would lie about this since they sell both heads for about the same price. What I'm thinking is that the E-Tecs don't start to shine until higher rpms and the tpi setup is restricting them. The Fast Burns are probably a better "all around" head because they still make good power at lower rpms. I questioned these dyno tests when I talked to him but he said he was looking at the dyno sheets right in front of him. Come to think of it, those numbers seem very low for a hot cammed motor with those heads. It's possible he could have said ZZ4 cam but I'm almost positive it was the LT4 hot cam. I'll try to find out for sure.

Stephen

*** ADMIN EDIT ***
Sorry Stephen, I received this email and edited your post accordingly using * to replace actual names:

This person was not authorized to use my name or Scoggin Dickeys name in his message.
Your assistance would be greatly appreciated..........

Brian Gruben

[This message has been edited by Dirk (edited December 11, 2001).]

dropkeel

I am skeptical about any of S/D's dyno numbers but the Etech 200's are undoubtedly good heads.The S/D TPI manifold will restrict them and porting the manifold runners the needed 7 inches or so would be difficult if not impossible w/o a flow bench.That huge injector boss on their manifold is an issue all by itself.I think the 200,s would be great on a carbed motor.Here is what they flow .Compare them to the AFR 190's.They hold there own especially for the price.
> int/exh
> 100 67/57
> 200 122/110
> 300 175/153
> 400 223/182
> 500 252/196
> 600 259/204
> 700 265/207
>
edited to add they should work well with a single pattern cam and headers


[This message has been edited by dropkeel (edited December 09, 2001).]

arthur

I believe that the GM 'Fast Burn' heads are double drilled to accept either the vortec 'or' standard intakes. I was 100% sure I had seen this before. This isn't the exact link I was looking for, but you can see the standard 12 bolt holes, as well as the 'new' 8 bolt style. Although you do have to look closely. If there is a problem with the center bolts being a problem on the stock TPI intake, different angles, it's much cheaper to change that than buy a whole new intake from Scogg-**** . It sounds like they're just trying to cash in anyway, with their price increases etc.

https://www.spoperformanceparts.com/...=680&CATID=671

1bad91Z

iTrader: (1)

Yes, you "SHOULD" be able to use the standard style TPI base with fast-burn heads, BUT... the standard base does not have the taller ports like the SD vortec base does, hence the need for the redesigned vortec base. PLus, the SD vortec base outflows any standard style TPI base (stock for stock with no additional porting. Keep in mind that parts in a motor need to work together in harmony to build horsepower. A motor is only as good as it's weakest link.

dropkeel

1bad91Z,
you posted:
"Also keep in mind that the scoggin-dickey vortec base flows more air than any standard style TPI base, it even out flows the TPIS big mouth"
I assume this includes the Accel base.
Where did you get this information?Will you post those comparative flow numbers?

1bad91Z

iTrader: (1)

As far as standard style TPI bases go, the TPIS big mouth flows the most cfm when you have them port match it to the runner gaskets (also depends what kind of runner you have). It will flow more than the Edelbrock, Accell/lingenfelter, and way more than a stock ported base. Now, keep in mind that these intake bases are for conventional L98 style heads. Now lets look at the SDPC Vortec base. This base is redesigned for Vortec/Fast-Burn/E-tec style heads which have TALLER ports, therefor the Vortec base has taller ports which is Great for more Airflow (CFM wise), but weakens air velocity a little bit. I've spoken with Brian at SDPC for awhile (nice long distance bill) and he told me the flow numbers for the bases (I dont remember exact cfm off hand) and the differences in airflow between all the aftermarket bases wasnt all THAT much, but it ALL depends on the heads you will be running. In my situation, I will be running Fast-burn heads, so I will need the Vortec base. If I was going to use conventional style heads, I would use the TPIS base. If you are just looking for 400hp at the flywheel, Edelbrock has a TPI performance package which includes victor jr. heads, e-TPI base, e-Siamesed runners, and some other stuff. That package on top of a 10to1 400ci small block with a cam ~.550 lift 230-235duration @.050 should have no problems making 400 + at the flywheel(keep in mind you will need 24lb injectors and a chip burned for this setup). I'm looking to make 400+ at the back wheels, so I'm taking the Fast-burn / vortec base route as I mentioned above.