adding nitrous to a tpi style intake manifold

grumpyvette

Administrator
Staff member
PROVIDED the heads, cam and exhaust systems are designed for the increased flow rates, adding A dual 58 mm throttle body , that can be installed on a ported TPI intake can easily supply 1000cfm,of air flow and easily support over 600hp, IF SUPERCHARGED to overcome the basic intakes design restrictions (if you upgrade the intake to a PORTED STEALTH RAM it can easily support 500 plus hp without the supercharger) and add a nitrous plate behind it or direct port injection for the nitrous and your easily over 700 plus hp.
YES direct port injection is superior too a behind the throttle body spray bar for both hp potential and for fuel/air/nitrous distribution.
A WET system like this (BELOW)will require that you drill the runners and weld in bungs but it provides superior hp and control.BTW To remove the connector from the injector, push carefully in the middle of the locking clip, with your thumb, This will make the sides, and tips move OUT WARD in their connector slots allowing the tips that hold the injector into the connector to slide out of the way from the injector body, and you can then pull the sides away. WATCH the locking clip - IT can and WILL come off and get lost, if your not careful

READ THIS
viewtopic.php?f=55&t=823

nos-05088nos_w.jpg


http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-05088NOS&N=700+115&autoview=sku

http://www.gmtips.com/3rd-degree/dox/ti ... t/port.htm

viewtopic.php?f=55&t=1509

http://www.chevyhiperformance.com/techa ... index.html
nos-13420nos_w.jpg


http://www.gmhightechperformance.com/te ... ystem.html

http://www.popularhotrodding.com/engine ... index.html


http://www.chevymania.com/tech/fuelinjection.htm
http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-13420NOS&N=700+115&autoview=sku

ID strongly suggest you never even think about a dry nitrous system as they tend to have far more problems, if you don,t have a TIG welder you can use alumaweld on the bungs

viewtopic.php?f=60&t=851

you use alumaweld like a aluminum solder, and while its not as good as a TIG WELD , its certainly serviceable in that application if done correctly, just be sure the bungs are welded in a location so that individual fogger nozzles point at the back of the intake valves, and you can plumb and wire up the feed lines correctly, think it thru carefully before drilling or welding on your intake.

http://www.thirdgen.org/nitrous

148_0207_tpi_7_z.jpg

89F34528C1E141548C7EB4DAF97A25E6.jpg



WATCH THIS


http://www.streetlegaltv.com/forum/nitr ... -3389.html
 
the stock TPI intake uses a DUAL throttle body with about 48mm twin bores an aftermarket 58mm BLADE throttle body, is available and on the higher hp engine combos it can be a slight improvement, as the stock THROTTLE BODY might be a SLIGHT restriction in some cases, (but not nearly as much as many guys believe)
keep in mind a dual 58 mm tb flows about 1000cfm if matched to the correct engine combo, easily more than enought air flow for over 800hp.

THE DISPLACEMENT,HEAD FLOW and HEADERS AND EXHAUST are huge factors here!

bbk-1539_w_m.jpg

that flows easily more than necessary to get to 600hp even un-supercharged. ford and some chevy, on some engines, use a single BLADE throttle body
bbk-1703_w_m.jpg


http://www.ws6.com/mod-11.htm

a dual 58mm throttle body equals a single 82mm throttle body flow rate

READ THIS ALSO

viewtopic.php?f=32&t=787
 
LOTS of guys have both hood clearance issues and a desire to keep their hood looking stock, but want to run a healthy nitrous system, on their dual plane factory intake, or aftermarket single plane intake so they won’t need to add a hood scoop.

http://www.chevyhiperformance.com/techa ... index.html

http://go.mrgasket.com/pdf/DFIInduction_Accessories.pdf

http://www.compucarnitrous.com/index.ph ... &Itemid=70

http://www.barrygrant.com/fromBarryGran ... ITROUS.pdf

http://www.holley.com/data/Products/Tec ... 2-SNOS.pdf

http://www.jegs.com/p/NOS/749110/10002/-1




THE TPI INTAKE is a true P.I.T.A, to set up with nitrous UNLESS you sellect either a throttle body fogger or your willing to weld bungs for individual fogger nozzles in each runner

If your going to use a single spray bar nitrous system under the carb, a high rise single plane with a direct line of site shot from the plenum to the back of the intake valve in the heads is the PREFERED route with NITROUS
I generally use this SBC intake.
hly-300-110.jpg

http://store.summitracing.com/partdetail.asp?part=HLY-300-110&autoview=sku

or this one
http://store.summitracing.com/partd...=HLY-9901-101-1&N=700+303894+115&autoview=sku
hly-9901-101-1.jpg


no the injector bungs on fuel injection intakes are not a direct fit to the fogger nozzles unless you use the piggy back nozzles HOLLEY SELLS but it speeds the conversion.
nos-02001nos_w.jpg


http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-02001NOS&N=700+115&autoview=sku

But since you’ve got clearance issues and choose not to swap intakes, you can EITHER have the divider in the dual plane plenum removed by almost any milling machine equipped machine shop and have a reasonable component that should function, reasonably well, or take a different route, like I point out below, I doubt the dual plane/single spray bar will be AS effective at fuel/air ratio control but it should function, and there’s lots of guys doing that, so its not doing something totally new. OR you can insure equal fuel/air distribution and decent power with a direct port nitrous set up. Where, you’ll have each intake runner equipped /with a threaded bung with its own fogger nozzle.
nos-02462nos_w.jpg


http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-02462NOS&N=700+115&autoview=sku

on BBC engines I’ve generally used the HOLLEY EFI intakes as they are pre set up to some extent.
hly-9901-209.jpg

http://store.summitracing.com/partd...rt=HLY-9901-209&N=700+303894+115&autoview=sku
IF you don’t remove the plenum divider in the dual plane intake plenum, there’s a BETTER chance of having distribution issues but there’s lots of guys doing it successfully so it can be done, only testing will tell.

BTW MOST FOGGER NOZZLES ARE THREADED FOR 1/16" N/P THREAD, so youll still need welding or epoxy to get them adapted & installed
 
I'm curious whether the recommendation to not use a dry nitrous shot changes if someone is using a modern aftermarket EFI system like a Holley HP, Dominator, or Terminator? (I'd like to think that if the EFI system is actually controlling the nitrous injection that it can and does enrich the fuel at the same time so that there's no need for the O2 sensors to be involved and there really shouldn't be any extra lag.) -Of course this assumes you have plenty of excess fuel injector, fuel line, and pump capacity....


My understanding is that the TPI already has pretty poor cylinder to cylinder air distribution issues and that liquid distribution is even worse. -Does this mean that Port EFI is really the safer way to go on a TPI intake if it's in the budget?


Does anyone have any good guidance / links on bending lines and drilling, tapping, and installing your own port nitrous?

-I've got some pictures of an AWESOME port EFI plumbed FIRST Fuel Injection TPI intake that's all plumbed from underneath and it's very stealthy-looking, for the most part.

I fear my old stock Pink GM rods (and stock rod bolts...) probably shouldn't see any nitrous...

Underside sneaky NOS.jpg

Top side fuel and Nitrous ports.jpg
-I wonder if you could make the feed lines come through the back of the block so they'd be more hidden than in this particular install...


The owner of that FIRST intake had it on a a large cubic inch aftermarket Brodix SBC block and also had a super charger on it, but died before it got installed and I found the intake while the parts from the build were being parted out and sold. -That guy was a true torque maniac! Sad to see that he never got to drive the thing (it was meant for a boat, if I remember correctly).


Adam
 
yes you could surely do the nitrous feed from the rear I had a wet flow throttle body nitrous system like this on my vette

http://noel.prodigitalsoftware.com/NCtpi.html

http://garage.grumpysperformance.com/index.php?threads/ideal-tpi-build.12203/#post-76070

http://garage.grumpysperformance.co...-stock-tpi-engine-components.1509/#post-74581
www.lethalperformance.com

Nos 05151NOS Gm Tuned Port Inj Kit W/10 Lb

Nos 05151NOS Gm Tuned Port Inj Kit W/10 Lb Lethal Performance is proud to offer the entire line of Holley and ALL Subsidiaries products!
www.lethalperformance.com
www.lethalperformance.com

05151NOS.jpg


M198814719.jpg



http://garage.grumpysperformance.co...rger-intake-runners-l98-tpi.13785/#post-72541

www.motortrend.com

Stealth TPI Induction - L98 Stroker Installation - Super Chevy Magazine

This Chevrolet L98 TPI engine has its displacement stroked to 383 cubic inches and has stealth mods installed including a new cam and an extrude honed tuned port injection system to make 458 HP - Super Chevy Magazine
www.motortrend.com

http://garage.grumpysperformance.co...lay-switch-locations-and-info.728/#post-66935

http://garage.grumpysperformance.co...intake-for-cross-fires.2796/page-7#post-56659

http://garage.grumpysperformance.co...8mm-throttle-body-on-your-tpi.290/#post-54181

http://garage.grumpysperformance.co...ps-on-building-a-tpi-383-c4.10434/#post-51507

http://garage.grumpysperformance.com/index.php?threads/matt383-engine-swap.8925/#post-91116

http://garage.grumpysperformance.com/index.php?threads/can-you-get-there-with-tpi.10494/#post-44299

http://garage.grumpysperformance.com/index.php?threads/tpi-flow-info.10382/#post-43474

http://garage.grumpysperformance.co...m-dyno-results-and-other-info.433/#post-37683

http://garage.grumpysperformance.co...y-current-corvettes-383-combo.430/#post-32660

I rather enjoy the , local Saturday night "run what your brought"
racing, yes your limited to about a 13 second car,
but its still fun to watch because its mostly guys in street driven cars
what screws it up is theres always some guy that could run low 10 seconds with $5000 plus in computer controlled equipment,
that basically lets the car run the race, and click off boringly consistent runs
making the guys with basic street driven cars at a huge disadvantage in the long term.
when I first got my 1985 corvette it would consistently run about 14.5 seconds in its O.E.M. condition,
once I tweaked a few things and added a few parts .
consistent 13.3 second runs.
at this point I had a great deal of fun with the corvette.
yeah I decided to tweak the combo a bit, changed cams, several times, ported heads,added a 3200 rpm stall,
swapped to a custom ported and significantly modified stealth ram,much larger injectors, a new ignition,added slicks,
added a better 3" full length and well designed low restriction,exhaust ,
and low 11 second runs, with a 250 hp, wet nitrous kit ,
and getting told I could no longer race the car was a huge P.I.T.A.

related threads,
ignoring reading the links and sub-links is always a mistake

http://garage.grumpysperformance.com/index.php?threads/my-current-corvettes-383-combo.430/

http://garage.grumpysperformance.co...ive-are-the-stock-tpi-engine-components.1509/

http://garage.grumpysperformance.com/index.php?threads/how-big-a-fuel-pump-do-you-need.1939/

http://garage.grumpysperformance.co...n-jumping-in-with-both-feet.14918/#post-84132

http://garage.grumpysperformance.com/index.php?threads/ideal-tpi-build.12203/#post-76070

http://garage.grumpysperformance.co...ht-through-1985-vette-combo.14289/#post-72935

http://garage.grumpysperformance.com/index.php?threads/a-high-torque-406.12184/#post-68419

http://garage.grumpysperformance.com/index.php?threads/calculate-fuel-injector-size.1200/

http://garage.grumpysperformance.co...electing-a-torque-converter-stall-speed.1715/

http://garage.grumpysperformance.co...n-jumping-in-with-both-feet.14918/#post-84073

http://garage.grumpysperformance.com/index.php?threads/installing-a-big-block-chevy-in-a-c4.6/

http://garage.grumpysperformance.co...lap-on-factory-headers.3155/page-2#post-66721

http://garage.grumpysperformance.co...rger-intake-runners-l98-tpi.13785/#post-72541


USE THE CALCULATORS to match port size to intended rpm levels... but keep in mind valve lift and port flow limitations[/color]
http://www.wallaceracing.com/runnertorquecalc.php

http://www.circletrack.com/enginetech/1 ... ch_engine/
calculate horse power from intake port flow rates
http://www.wallaceracing.com/calcafhp.php

http://www.wallaceracing.com/calchpaf.php

http://www.wallaceracing.com/ca-calc.php

http://www.wallaceracing.com/max-rpm.php

http://www.wallaceracing.com/lpv.php

http://www.wallaceracing.com/chokepoint.php

http://www.wallaceracing.com/chokepoint-rpm.php

http://www.wallaceracing.com/area-under-curve.php

http://www.wallaceracing.com/piston-speed-velocity.php

http://www.wallaceracing.com/header_length.php


I used a WET fuel/nitrous 250 hp rated THROTTLE BODY spray bar PLATE behind the 58MM throttle body on my TPI intake, not individual injectors


http://garage.grumpysperformance.co...8mm-throttle-body-on-your-tpi.290/#post-54181

http://garage.grumpysperformance.com/index.php?threads/porting-can-help.462/

 
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